IAPMO UMC ITM 2021

Sun, 20 Oct 2024 08:34:36 +0000

2021 Uniform Mechanical Code Illustrated Training Manual provides the most complete reference document for all levels of code users of the 2021 Uniform Mechanical Code. The commentary narrative is a living document that continues to grow and mature and displays qualities that have progressed beyond its previous edition. Known for technical accuracy, its value lies in its use as a training document. Every narrative has been revaluated for both its technical and grammatical content.

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PDF Pages	PDF Title
1	Preface
4	Foreword
5	2018 IAPMO Publication Development Committee 2019 IAPMO Publication Development Committee 2020 IAPMO Publication Development Committee
6	Table of Contents Chapter 1 Administration Chapter 2 Definitions Chapter 3 General Regulations Chapter 4 Ventilation Air Chapter 5 Exhaust Systems Chapter 6 Duct Systems Chapter 7 Combustion Air Chapter 8 Chimneys and Vents Chapter 9 Installation of Specific Appliances Chapter 10 Boilers and Pressure Vessels Chapter 11 Refrigeration Chapter 12 Hydronics Chapter 13 Fuel Gas Piping Chapter 14 Process Piping Chapter 15 Solar Energy Systems Chapter 16 Stationary Power Plants Chapter 17 Referenced Standards Appendix A Residential Plan Examiner Review Form for HVAC System Design Appendix B Procedures to be Followed to Place Gas Equipment in Operation Appendix C Installation and Testing of Oil (Liquid) Fuel-Fired Equipment Appendix D Fuel Supply: Manufacturered/Mobile Home Parks and Recreational Vehicle Parks Appendix E Sustainable Practices Appendix F Geothermal Energy Systems Appendix G Sizing of Venting Systems and Outdoor Combustion and Ventilation Opening Design Appendix H Example Calculation of Outdoor Air Rate Useful Tables
7	Learning Links
8	CHAPTER 1 ADMINISTRATION 101.0 General. 101.1 Title. 101.2 Scope. 101.3 Purpose. 101.4 Unconstitutional. 102.0 Applicability. 102.1 Conflicts Between Codes. 102.2 Existing Installations. 102.3 Maintenance. TABLE FIGURE
9	102.3.1 Commercial HVAC Systems. 102.3.2 Residential HVAC Systems. 102.4 Additions, Alterations, Renovations, or Repairs. 102.5 Health and Safety. 102.6 Changes in Building Occupancy. 102.7 Moved Structures. 102.8 Appendices.
10	103.0 Duties and Powers of the Authority Having Jurisdiction. 103.1 General. 103.2 Liability. 103.3 Applications and Permits. 103.3.1 Licensing. 103.4 Right of Entry.
11	104.0 Permits. 104.1 Permits Required. 104.2 Exempt Work. 104.3 Application for Permit.
12	FIGURE 104.1 SAMPLE PERMIT
13	104.3.1 Construction Documents. 104.3.2 Plan Review Fees. 104.3.3 Time Limitation of Application.
14	104.4 Permit Issuance. 104.4.1 Approved Plans or Construction Documents. 104.4.2 Validity of Permit. 104.4.3 Expiration.
15	104.4.4 Extension. 104.4.5 Suspension or Revocation. 104.4.6 Retention of Plans. 104.5 Fees. 104.5.1 Work Commencing Before Permit Issuance. 104.5.2 Investigation Fees. 104.5.3 Fee Refunds.
16	105.0 Inspections and Testing. 105.1 General. 105.2 Required Inspections. 105.2.1 Uncovering. 105.2.2 Other Inspections. 105.2.3 Inspection Requests.
17	105.2.4 Advance Notice. 105.2.5 Responsibility. 105.2.6 Reinspections. 105.3 Testing of Systems. 105.3.1 Defective Systems.
18	105.3.2 Retesting. 105.3.3 Approval. 105.4 Connection to Service Utilities. 106.0 Violations and Penalties. 106.1 General. 106.2 Notices of Correction or Violation. 106.3 Penalties. 106.4 Stop Orders. 106.5 Authority to Disconnect Utilities in Emergencies.
19	106.6 Authority to Condemn. 107.0 Board of Appeals. 107.1 General. 107.2 Limitations of Authority.
20	TABLE 104.5 MECHANICAL PERMIT FEES
22	CHAPTER 2 DEFINITIONS 201.0 General. 201.1 Applicability. 202.0 Definition of Terms. 202.1 General. 203.0 – A – FIGURES FIGURE 203.0 AIR HANDLING UNIT
23	204.0 – B – FIGURE 204.0 HIGH PRESSURE BOILER
24	205.0 – C – FIGURE 205.0A FACTORY-BUILT CHIMNEY
25	FIGURE 205.0B CONTINUOUS PILOT
26	206.0 – D – FIGURE 206.0A FIRE DAMPER FIGURE 206.0B SMOKE DAMPER FIGURE 206.0C VOLUME DAMPER
27	207.0 – E – FIGURE 206.0D DRAFT HOOD FIGURE 206.0E DUCT FURNACE FIGURE 207.0 EVAPORATIVE COOLER
28	208.0 – F – FIGURE 208.0A FIREPLACE STOVE FIGURE 208.0B FLOOR FURNACE
29	209.0 – G – 210.0 – H – FIGURE 208.0C CENTRAL FURNACE
30	211.0 – I – 212.0 – J – FIGURE 211.0A INTERMITTENT PILOT
31	213.0 – K – 214.0 – L – FIGURE 211.0B INTERRUPTED PILOT
32	215.0 – M – 216.0 – N – 217.0 – O – 218.0 – P –
33	219.0 – Q – 220.0 – R –
34	221.0 – S –
35	222.0 – T – 223.0 – U – FIGURE 222.0A TYPE B GAS VENT FIGURE 222.0B TYPE B-W GAS VENT
36	224.0 – V – FIGURE 224.0A PRESSURE RELIEF VALVE FIGURE 224.0B GAS VENT CONNECTOR
37	225.0 – W – 226.0 – X – 227.0 – Y – 228.0 – Z –
38	CHAPTER 3 GENERAL REGULATIONS 301.0 General. 301.1 Applicability. 301.2 Approval. 301.3 Design of Equipment. 301.4 Electrical Connections. TABLES FIGURES FIGURE 301.3 APPLIANCE LABEL
39	301.5 Oil-Burning Appliances. 301.6 Personnel Protection. 302.0 Materials – Standards and Alternates. 302.1 Minimum Standards. 302.1.1 Marking. FIGURE 302.1.1A PIPE MARKING
40	302.1.2 Standards. 302.1.3 Existing Buildings. 302.2 Alternate Materials and Methods of Construction Equivalency. FIGURE 302.1.1B IAPMO PRODUCT LABELS
41	302.2.1 Testing. 302.2.1.1 Tests. 302.2.1.2 Request by the Authority Having Jurisdiction. 302.3 Alternative Engineered Design. 302.3.1 Permit Application. 302.3.2 Technical Data. 302.3.3 Design Documents. 302.3.4 Design Approval.
42	302.3.5 Design Review. 302.3.6 Inspection and Testing. 303.0 Installation. 303.1 Listed Appliances. 303.2 Closet or Alcove Installations. 303.3 Unlisted Appliances.
43	303.4 Anchorage of Appliances. 303.5 Movement. 303.6 Identification of Equipment. 303.7 Liquefied Petroleum Gas Facilities. FIGURE 303.4 ANCHORING OF APPLIANCES FIGURE 303.5 RESTRAINING DEVICE FOR APPLIANCES WITH CASTERS
44	303.8 Appliances on Roofs. 303.8.1 Load Capacity. 303.8.2 Fasteners. 303.8.3 Installation of Appliances on Roofs. 303.8.4 Edge of Roof Clearance. 303.8.4.1 Guards and Rails. FIGURE 303.6 IDENTIFICATION OF EQUIPMENT AS TO SPACE, AREA OR UNIT SERVED FIGURE 303.8.4 MECHANICAL EQUIPMENT AND ROOF ACCESS CLEARANCES FROM EDGE OF ROOF
45	303.8.5 Electrical Power. 303.8.6 Platform or Walkway. 303.9 Avoiding Strain on Gas Piping. 303.10 Clearances. 303.10.1 Clearance Reduction. 303.10.1.1 Type I Hood Exhaust System. 303.10.1.2 Product Conveying Ducts. 303.10.1.3 Solid-Fuel Burning Appliances. 303.11 Installation in Commercial Garages. 303.11.1 Repair Garages. 303.12 Installation in Aircraft Hangars. 304.0 Accessibility for Service. 304.1 General.
46	304.2 Sloped Roof. 304.3 Access to Appliances on Roofs. 304.3.1 Access. FIGURE 304.1A ACCESS AND CLEARANCE REQUIREMENTS FIGURE 304.1B ACCESS TO APPLIANCES FOR INSPECTION, SERVICE, OR REPAIR FIGURE 304.2 ANGLE OF SLOPED ROOF
47	304.3.1.1 Access Type. 304.3.1.2 Permanent Ladders. 304.3.2 Permanent Lighting. 304.4 Appliances in Attics and Under-Floor Spaces. 304.4.1 Length of Passageway. 304.4.2 Width of Passageway. 304.4.3 Work Platform. FIGURE 304.3.1.1A INTERIOR FOLDAWAY LADDER FIGURE 304.3.1.1B ROOF ACCESS
48	304.4.4 Lighting and Convenience Outlet. 305.0 Location. 305.1 Installation in Residential Garages. 305.1.1 Physical Damage. 305.1.2 Access from the Outside. 305.1.3 Cellulose Nitrate Plastic Storage. 305.2 Pit Location. 305.3 Flood Hazard Areas. FIGURE 305.1 PROTECTION OF APPLIANCES IN GARAGES FIGURE 305.1.2 EXCEPTION TO ELEVATING OF APPLIANCE ABOVE GARAGE FLOOR
49	305.3.1 Coastal High Hazard Areas. 305.3.2 Air Exhaust and Intake Openings. 305.4 Elevator Shaft. 305.5 Drainage Pan. 306.0 Automatic Control Devices. 306.1 General.
50	FIGURE 306.1A AUTOMATIC CONTROL DEVICES FIGURE 306.1B TEMPERATURE LIMIT CONTROLS FIGURE 306.1C AIR OUTLET LIMIT CONTROL
51	307.0 Labeling. 307.1 Fuel-Burning Appliances. 307.2 Electric Heating Appliances. 307.3 Heat Pump and Electric Cooling Appliances. 307.4 Absorption Units. FIGURE 306.1D ELECTRIC DUCT HEATER TEMPERATURE CONTROL
52	308.0 Improper Location. 308.1 General. 309.0 Workmanship. 309.1 Engineering Practices. 309.2 Concealing Imperfections. 309.3 Installation Practices. 310.0 Condensate Wastes and Control. 310.1 Condensate Disposal. FIGURE 308.1 IMPROPER LOCATION OF PIPING
53	310.1.1 Condensate Pumps. 310.2 Condensate Control. FIGURE 310.1A CONDENSATE DRAIN TERMINATIONS FIGURE 310.1B DRY WELL FOR CONDENSATE DRAIN
54	310.2.1 Protection of Appurtenances. 310.3 Condensate Waste Pipe Material and Sizing. 310.3.1 Cleanouts. 310.4 Appliance Condensate Drains. 310.5 Point of Discharge. 310.6 Condensate Waste From Air-Conditioning Coils. TABLE 310.3 MINIMUM CONDENSATE PIPE SIZE
55	310.7 Plastic Fittings. 311.0 Heating or Cooling Air System. 311.1 Source. 311.2 Air Filters. 311.3 Prohibited Source. FIGURE 311.2 AIR-CONDITIONING FILTERS
56	311.4 Return-Air Limitations. 312.0 Plumbing Connections. 312.1 General. 313.0 Hangers and Supports. 313.1 General. FIGURE 311.3A RETURN AIR FROM OTHER SPACES FIGURE 311.3B BLOWER-TYPE FURNACE RETURN AIR EXCEPTION FIGURE 313.0 PIPE SUPPORTS WITH INSULATION
57	313.2 Material. 313.3 Suspended Piping. 313.4 Alignment. 313.5 Underground Installation. 313.6 Hanger Rod Sizes. 313.7 Gas Piping. 314.0 Balancing. 314.1 General. 315.0 Louvers in Hurricane Prone Regions. 315.1 General. 315.1.1 Testing. TABLE 313.6 HANGER ROD SIZES
58	315.1.2 Impact Resistance Test. 316.0 Protection of Piping, Tubing, Materials, and Structures. 316.1 General. 316.2 Installation. FIGURE 316.2 PROPER PLACEMENT OF PIPING WITHIN WALLS
59	316.3 Corrosion, Erosion, and Mechanical Damage. 316.4 Protectively Coated Pipe. 316.5 Fire-Resistant Construction. 316.6 Steel Nail Plates. 316.7 Sleeves. 316.7.1 Building Loads. 316.7.2 Exterior Walls. 316.8 Firewalls. 316.9 Structural Members. 316.10 Rodentproofing. 316.11 Metal Collars. FIGURE 316.6 USE OF NAIL PLATES
60	317.0 Trenching, Excavation, and Backfill. 317.1 Trenches. 317.2 Tunneling and Driving. 317.3 Open Trenches. 317.4 Excavations.
61	TABLE 303.10.1 REDUCTION OF CLEARANCES WITH SPECIFIED FORMS OF PROTECTION
62	FIGURE 303.10.1(1) EXTENT OF PROTECTION NECESSARY TO REDUCE CLEARANCES FROM GAS APPLIANCES OR VENT CONNECTORS FIGURE 303.10.1(2) WALL PROTECTOR CLEARANCE REDUCTION SYSTEM FIGURE 303.10.1(3) MASONRY CLEARANCE REDUCTION SYSTEM
63	TABLE 313.3 HANGERS AND SUPPORTS
64	CHAPTER 4 VENTILATION AIR 401.0 General. 401.1 Applicability. 402.0 Ventilation Air. 402.1 Occupiable Spaces. 402.1.1 Construction Documents. TABLES FIGURES
65	402.1.2 Ventilation in Health Care Facilities. 402.2 Natural Ventilation. 402.2.1 Floor Area to be Ventilated. 402.2.1.1 Single Side Opening. 402.2.1.2 Double Side Opening. 402.2.1.3 Corner Openings. 402.2.1.4 Ceiling Height. 402.2.2 Location and Size of Openings.
66	402.2.3 Control and Accessibility. 402.3 Mechanical Ventilation. FIGURE 402.2.2A EXAMPLE FIGURE 402.2.2B EXAMPLE
67	402.4 Outdoor Air Intake Protection. 402.4.1 Weather Protections. 403.0 Ventilation Rates. 403.1 General. 403.2 Zone Calculations. 403.2.1 Breathing Zone Outdoor Airflow.
68	403.2.2 Zone Air Distribution Effectiveness. 403.2.3 Zone Outdoor Airflow. 403.3 Single-Zone Systems. 403.4 One Hundred Percent Outdoor Air Systems.
69	403.5 Multiple-Zone Recirculating Systems. 403.5.1 Uncorrected Outdoor Air Intake. 403.5.1.1 Occupant Diversity. 403.5.1.2 System Ventilation Efficiency. 403.5.1.3 Simplified Procedure for System Ventilation Efficiency. 403.5.1.4 Zone Minimum Primary Airflow. 403.5.2 Outdoor Air Intake. 403.6 Design for Varying Operating Conditions. 403.6.1 Short-Term Conditions.
70	403.7 Exhaust Ventilation. 403.7.1 Parking Garages. 403.7.2 Enclosed Parking Garages. 403.8 Dynamic Reset. 403.9 Air Classification and Recirculation. 403.9.1 Class 1 Air. 403.9.2 Class 2 Air.
71	403.9.3 Class 3 Air. 403.9.4 Class 4 Air. 404.0 Alternative Procedure for Multiple-Zone Systems Ventilation Efficiency. 404.1 General. 404.2 Average Outdoor Air Fraction. 404.3 Zone Ventilation Efficiency. 404.3.1 Single Supply Systems. 404.3.2 Secondary-Recirculation Systems.
72	405.0 Indoor Air Quality for Residential Occupancies. 405.1 General. 405.1.1 Natural Ventilation. 405.2 Ventilation Air Rate. 405.2.1 Reduced Ventilation Air Rate. 405.3 Bathroom Exhaust. 405.3.1 Exhaust Rate. 405.4 Kitchen Exhaust. 405.4.1 Exhaust Rate. 405.5 Ventilation Openings.
73	TABLE 402.1 MINIMUM VENTILATION RATES IN BREATHING ZONE
75	TABLE 403.2.2 ZONE AIR DISTRIBUTION EFFECTIVENESS
76	TABLE 403.7 MINIMUM EXHAUST RATES
78	CHAPTER 5 EXHAUST SYSTEMS 501.0 General. 501.1 Applicability. 502.0 Termination. 502.1 Exhaust Opening Protection. 502.2 Termination of Exhaust Ducts. 502.2.1 Environmental Air Ducts. 502.2.2 Product Conveying Ducts. 502.2.3 Commercial Kitchen Ducts. TABLES FIGURES
79	Part I – Environmental Air Ducts andProduct-Conveying Systems. 503.0 Motors, Fans, and Filters. 503.1 General. 503.2 Fans. FIGURE 503.1 PRODUCT-CONVEYING DUCT
80	504.0 Environmental Air Ducts. 504.1 General. 504.1.1 Backdraft Protection. 504.2 Independent Exhaust Systems. 504.3 Domestic Range. 504.4 Clothes Dryers. FIGURE 503.2 RADIAL FAN AND TUBE AXIAL FAN
81	504.4.1 Provisions for Makeup Air. FIGURE 504.4 DOMESTIC CLOTHES DRYER AND MOISTURE EXHAUST DUCT FIGURE 504.4.2 CLOTHES DRYER AND FORCED-AIR FURNACE
82	504.4.2 Domestic Clothes Dryers. 504.4.2.1 Length Limitation. 504.4.2.2 Transition Ducts. 504.4.2.3 Exhaust Duct Power Ventilators. 504.4.3 Commercial Clothes Dryers. 504.4.3.1 Exhaust Ducts for Type 2 Clothes Dryers. 504.4.4 Common Exhaust. 504.4.5 Duct Supports.
83	504.5 Heat (Energy) Recovery Ventilators. 504.6 Gypsum Wallboard Ducts. 505.0 Product-Conveying Systems. 505.1 General. 505.1.1 Mechanical Ventilation. 505.2 Incompatible Materials. 505.3 Flammability Limit. 505.3.1 Higher Concentrations. FIGURE 504.5 HEAT RECOVERY VENTILATOR FIGURE 505.1A VEHICLE EXHAUST COLLECTION SYSTEM
84	FIGURE 505.1B EXHAUST COLLECTION SYSTEM FIGURE 505.1C VENTILATION DUCT DIRECTLY TO EXTERIOR
85	505.3.2 Ovens and Furnaces. 505.3.3 Deflagration. 505.4 Air-Moving Devices. 505.5 Generating Flames, Sparks, or Hot Materials. 505.6 Fire Dampers. 505.6.1 Prohibited. 505.7 Fire Detection and Alarm Systems. 505.7.1 Automatic Extinguishing System. 505.7.2 Shut Down Permitted. 505.8 Product-Conveying Ducts Classification. 505.9 Minimum Velocities and Circulation.
86	505.10 Makeup Air. 505.11 Hoods and Enclosures. TABLE 505.9 RANGE OF MINIMUM DUCT DESIGN VELOCITIES FIGURE 505.9 OPENING USED TO MAINTAIN A CONSTANT VELOCITY
87	506.0 Product-Conveying Ducts. 506.1 Materials. FIGURE 505.11 HOODS AND ENCLOSURES
88	506.2 Construction.
89	TABLE 506.2(1) MINIMUM SHEET METAL THICKNESS FOR ROUND DUCTS FOR PRODUCT-CONVEYING SYSTEM DUCTS
90	506.3 Penetrations.
91	506.3.1 Fire Barriers. 506.3.2 Protection. 506.4 Condensate. 506.4.1 Drainage. TABLE 506.2(2) MINIMUM SHEET METAL THICKNESS FOR RECTANGULAR DUCTS
92	506.5 Fittings. 506.6 Explosion Venting. 506.7 Supports. 506.8 Fire Protection. FIGURE 506.3 DUCT BRANCH FIGURE 506.6 EXPLOSION VENTS
93	506.8.1 Loads. 506.8.2 Corrosion. 506.8.3 Vibration and Stress. 506.8.4 Expansion and Contraction. 506.9 Protection from Physical Damage. 506.10 Duct Clearances. 506.10.1 Protection Provided. 506.10.2 Systems Conveying Combustible Materials. 506.10.3 Reduced Clearance Permitted. 506.10.4 Clearance Increases. 506.10.4.1 Temperatures Over 900°F. TABLE 506.10.4 BASIC MINIMUM CLEARANCES TO UNPROTECTED SURFACES
94	506.10.4.2 Clearance Reduction. 506.11 Clearance Reduction Methods. 506.11.1 Spacers and Ties. 506.11.2 Wool Batts Insulation. 506.11.3 Insulation Board. 506.11.4 Duct and Thermal Shield. 506.11.5 Thermal Shield and Combustible Surface. 506.11.6 Reduced Clearance with Air Gaps. 506.11.6.1 Air Circulation. 506.11.6.2 Single Flat Wall. TABLE 506.11 REDUCTION OF DUCT CLEARANCE WITH SPECIFIED FORMS OF PROTECTION
95	506.11.6.3 Thermal Shielding. Part II – Commercial Hoods and KitchenVentilation. 507.0 General Requirements. 507.1 Type I Hood Exhaust System. 507.2 Exhaust System. 507.2.1 Airflow. 507.2.2 Responsibility. 507.2.3 Solid-fuel Cooking Equipment. 507.2.4 Multitenant Applications. 507.2.5 Interior Surfaces. 507.2.6 Used in Other Applications. 507.3 Listed Devices. 507.3.1 Penetration. 507.4 Clearance. 507.4.1 Listed. 507.4.2 Clearance Reduction. 507.4.2.1 Mineral Wool Batts or Ceramic Fiber Blanket. 507.4.2.2 Field-Applied Grease Duct Enclosure. 507.4.2.3 Zero Clearance.
96	507.4.3 Clearance Integrity. 507.4.3.1 Fire. 507.4.3.2 Required Protection. 507.4.3.3 Protection Methods. 507.4.4 Factory Built. FIGURE 507.4 COMBUSTIBLE CLASSIFICATIONS
97	507.4.4.1 Listing. 507.4.4.2 Single Wall. 507.4.4.3 Installation. 507.4.5 Field Applied. 507.4.6 Both Field-Applied and Factory Built. 507.4.6.1 Physical Damage. 507.4.6.2 Specification. 507.4.6.3 Clearance Options. 507.4.7 Building and Structural Contact. 507.4.7.1 Corrosion Protection. 507.4.7.2 Zero Clearance. 507.4.8 Clearance Between Duct and Interior Surfaces.
98	507.5 Drawings. 507.6 Notification of Change. 508.0 Type I Hoods. 508.1 Where Required. 508.2 Listed Type I Hood Assemblies. 508.2.1 Listed Ultraviolet Hoods. 508.2.2 Listed Ventilated Ceiling Technology. 508.2.3 Construction of Listed Exhaust Hoods. 508.2.4 Assembly of Listed Exhaust Hoods. 508.3 Construction of Type I Hoods. 508.3.1 Grease Vapor. FIGURE 508.3.1 EXHAUST HOOD MOUNTING
99	508.3.2 Seams, Joints, and Penetrations. 508.3.2.1 Sealed. 508.3.3 Eyebrow-Type Hoods. 508.3.3.1 Duct Connection. 508.3.4 Insulation. 508.3.5 Exhaust Hood Assemblies with Integrated Supply-Air Plenums. FIGURE 508.3.2 EXHAUST SYSTEM SEAMS FIGURE 508.3.3 TYPICAL SECTION OF EYEBROW-TYPE HOOD FIGURE 508.3.5 INTEGRATED SUPPLY AIR HOOD
100	508.3.5.1 Outer Shell. 508.3.5.2 Inner Shell. 508.3.5.3 Fire Dampers. 508.3.5.3.1 Listing. 508.3.5.3.2 Actuating Temperature. 508.3.5.3.3 Exemption. 508.4 Supports. 508.5 Hood Size. 508.5.1 Canopy Size and Location. 508.5.1.1 Capacity of Hoods.
101	508.5.1.2 Extra-Heavy-Duty Cooking Appliances. 508.5.1.3 Heavy-Duty Cooking Appliances. 508.5.1.4 Medium-Duty Cooking Appliances. 508.5.1.5 Light-Duty Cooking Appliances. 508.5.2 Noncanopy-Type Hoods. TABLE 508.5.1.2 EXTRA-HEAVY-DUTY COOKING APPLIANCE AIRFLOW TABLE 508.5.1.3 HEAVY-DUTY COOKING APPLIANCE AIRFLOW TABLE 508.5.1.4 MEDIUM-DUTY COOKING APPLIANCE AIRFLOW TABLE 508.5.1.5 LIGHT-DUTY COOKING APPLIANCE AIRFLOW
102	508.5.2.1 Installation. 508.5.2.2 Capacity. 508.5.3 Labeling. 508.6 Solid-Fuel Hood Assemblies. 508.7 Exhaust Outlets. 509.0 Grease Removal Devices in Hoods. 509.1 Grease Removal Devices. 509.1.1 Grease Filters, Mesh-Type. 509.2 Installation. 509.2.1 Vertical Distance. FIGURE 508.5.2 LISTED HOOD FIGURE 509.1 EXHAUST SYSTEM GREASE FILTERS FIGURE 509.1.1 HEAVY DUTY ALUMINUM MESH
103	509.2.2 Grease Removal Device Protection. 509.2.2.1 Installation. 509.2.2.2 Size and Location. 509.2.2.3 Clearance. 509.2.3 Grease Filters. 509.2.3.1 Arrangement. 509.2.3.2 Accessibility. 509.2.3.3 Angled Installation. 509.2.4 Grease Drip Trays. 509.2.4.1 Size and Pitch. 509.2.5 Grease Filter Orientation. 509.3 Solid-Fuel Grease Removal Devices. 510.0 Exhaust Duct Systems. 510.1 General. 510.1.1 Fire Hazards. 510.1.2 Interconnection. FIGURE 509.2.4.1 GREASE FILTER DRIP TRAY
104	510.1.3 Duct Installation. 510.1.4 Accessibility. 510.1.5 Sign. 510.1.6 Bracing and Supports. 510.1.7 Type I Exhaust Duct Systems. 510.2 Clearance. 510.3 Openings. 510.3.1 Access Panel. 510.3.2 Access for Cleaning and Inspection. FIGURE 510.3 EXAMPLE OF OPENING IN A DUCT
105	510.3.3 Horizontal Ducts. 510.3.3.1 Cleaning. 510.3.3.2 Safe Access and Work Platform. 510.3.3.3 Support. 510.3.4 Vertical Ducts. 510.3.4.1 Access. 510.3.4.2 Safe Access and Work Platform. 510.3.5 Nonlisted Ductwork. 510.3.6 Access Panels. 510.3.6.1 Listed Grease Ducts. 510.3.6.2 Within an Enclosure. 510.3.7 Fire Protection System Devices. 510.4 Listed Grease Ducts. 510.4.1 Factory-Built Grease Ducts. 510.5 Other Grease Ducts. 510.5.1 Materials. 510.5.2 Factory-Built Grease Ducts. 510.5.3 Installation.
106	510.5.3.1 Duct Leakage Test. 510.5.3.2 Welded Duct Connection. FIGURE 510.5.3 PERMITTED DUCT-TO HOOD COLLAR CONNECTION FIGURE 510.5.3.2(1) TELESCOPING-TYPE DUCT CONNECTION FIGURE 510.5.3.2(2) BELL-TYPE DUCT CONNECTION
107	510.5.4 Butt Welded Connections. 510.5.5 Telescoping and Bell-Type Connections. 510.5.6 Duct Leakage Test. 510.6 Exterior Installations. 510.6.1 Weather Protection. 510.7 Interior Installations. FIGURE 510.5.3.2(3) FLANGE WITH EDGE WELD DUCT CONNECTION FIGURE 510.5.3.2(4) FLANGE WITH FILLED WELD DUCT CONNECTION
108	510.7.1 Less than Four Stories. 510.7.2 Four Stories or More. 510.7.3 Clearance. 510.7.4 Mechanical and Structural Integrity. 510.7.5 Materials. 510.7.5.1 Protection from Physical Damage. 510.7.5.2 Inspection. 510.7.6 Listed. 510.7.7 Fire Doors. 510.7.8 Ducts with Enclosure(s). 510.8 Underground Installations. 510.8.1 Grease Receptacle. 510.8.2 Cleanouts. 510.9 Termination of Type I Hood Exhaust System. 510.9.1 Rooftop Terminations.
109	510.9.1.1 Listed Vibration Isolation Connectors. 510.9.1.2 Inspection and Cleaning. 510.9.2 Wall Terminations. FIGURE 510.9.1 UPBLAST FAN CLEARANCES
110	510.10 Solid-Fuel Duct Systems. 511.0 Air Movement. 511.1 Exhaust Fans for Commercial Cooking Operations. 511.1.1 Upblast Fans. 511.1.2 In-Line Exhaust Fans. FIGURE 510.9.2 EXHAUST TERMINATION DISTANCE FROM FRESH AIR INTAKE (FAI) OR OPERABLE DOOR OR WINDOW
111	511.1.2.1 Accessibility. 511.1.3 Utility Set Exhaust Fans. FIGURE 511.1.2(1) TYPICAL SECTION OF DUCT-TO-FAN CONNECTION-BUTT JOINT METHOD FIGURE 511.1.2(2) TYPICAL SECTION OF DUCT-TO-FAN CONNECTION-OVERLAPPING METHOD FIGURE 511.1.2(3) TYPICAL SECTION OF DUCT-TO-FAN CONNECTION–SEALANT METHOD FIGURE 511.1.2(4) TYPICAL SECTION OF DUCT-TO-FAN CONNECTION-DIRECT TO FAN INLET CONE METHOD
112	511.1.3.1 At the Rooftop. 511.1.3.2 Within the Building. 511.1.3.3 Duct Systems. 511.1.4 Construction. 511.1.5 Openings. 511.1.6 Standard. 511.2 Airflow. 511.2.1 Exceptions. 511.2.2 Exhaust-Air Volumes. FIGURE 511.1.3A IN-LINE FAN FIGURE 511.1.3B TYPICAL UTILITY SET FAN
113	511.2.2.1 Performance Test. 511.2.2.2 Capture and Containment Test. 511.2.3 Exhaust Fan Operation. 511.3 Makeup Air. 511.3.1 Air Balance. 511.4 Common Duct (Manifold) Systems.
114	511.4.1 Connections. 511.4.2 Fire Damper. 511.4.3 Construction and Clearance. 511.4.4 Adjustment. 511.4.5 Adjustment Location. 511.4.6 Bleed Air Duct. 511.4.7 Disconnect. 511.5 Solid-Fuel Air Movement Requirements. 512.0 Auxiliary Equipment. 512.1 Dampers. 512.1.1 Use. FIGURE 511.3 HOOD REPLACEMENT AIR FIGURE 511.4 BLEED AIR SYSTEM
115	512.2 Electrical Equipment. 512.2.1 Device Installation in Ducts. 512.2.2 Lighting Units. 512.2.3 Concealed Spaces. 512.2.4 Listed Lighting Units. 512.2.5 Standard. 512.3 Other Equipment. 512.3.1 Access Required. 512.3.2 Downgrading. 512.3.3 Fire-Extinguishing System. 512.3.3.1 Protection. 512.3.3.2 Filter Media. 512.3.4 Source of Ignition. 512.3.5 Air Recirculation. 512.3.6 Carbon Monoxide Detector Required. 512.4 Solid-Fuel Auxiliary Equipment. 513.0 Fire-Extinguishing Equipment. 513.1 General. 513.1.1 Devices in Exhaust Ducts. 513.1.2 Protection. 513.2 Types of Equipment. 513.2.1 Identification.
116	513.2.2 Standard. 513.2.3 Installation. 513.2.4 Modification of Existing Hood Systems. 513.2.4.1 Sealing. 513.2.4.2 Obstructions. 513.2.4.3 System Re-evaluation. 513.2.5 Baffle Hoods with Water Wash. 513.2.5.1 Listed for the Purpose. 513.2.5.2 Domestic Water Supply. 513.2.5.3 Control Valve. 513.2.5.4 Activation. 513.2.5.5 Water-Wash System. 513.2.5.6 Exception. 513.2.5.7 Water Supply. 513.2.6 Water Valve Supervision.
117	513.3 Simultaneous Operation. 513.3.1 Hoods. 513.3.1.1 Common Ductwork. 513.3.2 Independent Systems. 513.3.3 Exempt Equipment. 513.3.4 Automatic Sprinkler System. 513.3.5 Dry or Wet Chemical Systems. 513.4 Fuel and Electric Power Shutoff. 513.4.1 Steam. 513.4.2 Protection Not Required. 513.4.3 Manual Reset. 513.5 Manual Activation.
118	513.6 System Annunciation. 513.6.1 Signaling. 513.7 Special Design and Application. 513.8 Review and Certification. 513.9 Installation Requirements. 513.10 Portable Fire Extinguishers. 513.10.1 Other Fire Extinguishers. 513.10.2 Carbon Dioxide-Type. 513.11 Maintenance. 513.11.1 Permitted Use. 513.12 Solid-Fuel Fire-Extinguishing Equipment. 514.0 Procedures for the Use, Inspection, Testing, and Maintenance of Equipment. 514.1 Operating Procedures. 514.1.1 Filters. 514.1.2 Openings. 514.1.3 Posting of Instructions. 514.1.4 Listing and Manufacturer’s Instructions. 514.1.5 Nonoperational. 514.1.6 Secondary Control Equipment. 514.1.7 Inspection Frequency. 514.2 Inspection, Testing, and Maintenance. 514.2.1 Requirements. 514.2.2 Fusible Links and Sprinklers. 514.2.3 Inspection Tag.
119	514.2.4 Temperature-Sensing Elements. 514.2.5 Certification. 514.3 Inspection for Grease Buildup. 514.4 Cleaning of Exhaust Systems. 514.4.1 Measurement System. 514.4.1.1 Combustible Contaminants. 514.4.1.2 Gauge Comb. 514.4.1.3 Cleaning Method. 514.4.1.4 Combustible Contaminants. 514.4.2 Removal of Contaminants. 514.4.3 Electrical Switches. 514.4.4 Fire Suppression System. 514.4.5 Inoperable. 514.4.6 Solvents/Cleaning Aids. 514.4.7 Cleaning Chemicals. 514.4.8 Coating. 514.4.9 Access Panels and Cover Plates. 514.4.10 Date of Inspection. 514.4.11 Airflow. 514.4.12 Operable State. TABLE 514.3 SCHEDULE OF INSPECTION FOR GREASE BUILDUP FIGURE 514.4.1.2 DEPTH GAUGE COMB
120	514.4.13 Certification of Service. 514.4.14 Report Provided. 514.4.15 Unclean Area. 514.4.16 Metal Containers. 514.5 Cooking Equipment Maintenance. 514.5.1 Cleaning. 515.0 Minimum Safety Requirements for Cooking Equipment. 515.1 Cooking Equipment. 515.1.1 Installation. 515.1.1.1 Re-evaluation. 515.1.1.2 Prior Location. 515.1.1.3 Minimum Space. 515.1.1.4 Space Not Required. 515.1.1.5 Minimum Height. 515.2 Operating Controls. 516.0 Recirculating Systems. 516.1 General Requirements.
121	516.2 Design Restrictions. 516.2.1 Gas/Electrically Fueled Cooking Appliances. 516.2.2 Recirculation. 516.2.3 Protection. 516.2.4 Maximum Limits. 516.2.5 Label. 516.2.6 Fire Damper. 516.2.7 Installation of Electrical Wiring. 516.2.8 Power Supply. 516.2.9 Listing Evaluation. 516.3 Interlocks. 516.3.1 Airflow Sections. 516.3.2 Filter Component. 516.3.3 ESP Interlocks. 516.3.3.1 Manual Reset. 516.3.4 Airflow Switch or Transducer. 516.4 Location and Application Restrictions. 516.5 Additional Fire Safety Requirements. 516.5.1 Installation Downstream.
122	516.5.2 Locations. 516.6 Use and Maintenance. 516.6.1 Manufacturer’s Instructions. 516.6.2 Cleaning Schedule. 516.6.3 Hood Plenum and Blower Section Cleaning Schedule. 516.6.4 Inspection of Safety Interlocks. 516.6.5 Inspection. 516.6.6 Maintenance Log. 517.0 Solid-Fuel Cooking Operations. 517.1 Venting Application. 517.1.1 Natural Draft. 517.1.2 System Compliance. 517.1.3 Makeup Air System. 517.1.4 Natural Draft Ventilation Systems. 517.1.5 Opening Requirements. 517.1.6 Spark Arresters. 517.2 Location of Appliances. 517.2.1 Prohibited Location. 517.2.2 Flammable Vapors. 517.3 Hoods for Solid-Fuel Cooking. 517.3.1 Separation. FIGURE 517.1.3 SOLID-FUEL COOKING EQUIPMENT
123	517.3.1.1 Equipment with Solid Fuel for Flavoring. 517.4 Exhaust Systems for Solid-Fuel Cooking. 517.4.1 Hood. 517.4.2 Building Exceeding Four Stories. 517.4.3 Prohibited. 517.5 Grease Removal Devices for Solid-Fuel Cooking. 517.5.1 Spark Arrester Devices. 517.5.2 Filters. 517.6 Air Movement for Solid-Fuel Cooking. 517.6.1 Replacement Air. 517.6.2 Operation. 517.7 Fire-Extinguishing Equipment for Solid-Fuel Cooking. 517.7.1 Grease Removal Devices, Hoods, and Duct Systems. 517.7.2 Listed Fire-Extinguishing Equipment. 517.7.3 Rating and Design.
124	517.7.4 Listing/Class. 517.7.5 Fixed-Water Pipe System. 517.7.6 Fuel Storage. 517.7.7 Auxiliary Fuel. 517.8 Other Safety Requirements. 517.8.1 Site-Built Solid Fuel Cooling Appliances. 517.8.2 Additional Devices. 517.8.3 Prohibited. 518.0 Downdraft Appliances. 518.1 General. 518.2 Ventilation System.
125	518.3 Fire-Extinguishing Equipment. 518.3.1 Integral Fire-Extinguishing System. 518.3.2 Interlocks. 518.4 Airflow Switch or Transducer. 518.4.1 Interlocks. 518.4.2 Manual Reset. 518.5 Surface Materials. 519.0 Type II Hood Exhaust System Requirements. 519.1 Where Required. 519.2 Construction of Type II Hoods. 519.3 Dishwashing Appliances. 519.4 Type II Exhaust Duct Systems. 519.5 Termination of Type II Hood Exhaust System. 519.6 Makeup Air.
126	CHAPTER 6 DUCT SYSTEMS 601.0 General. 601.1 Applicability. 601.2 Sizing Requirements. 602.0 Material. 602.1 General. 602.2 Combustibles Within Ducts or Plenums. TABLES FIGURES FIGURE 602.1 DETAIL OF PANNED JOIST SPACE (RESIDENTIAL
127	602.2.1 Electrical. 602.2.2 Fire Sprinkler Piping. 602.2.3 Pneumatic Tubing. 602.2.4 Discrete Products in Plenums. 602.3 Metallic. 602.4 Nonmetallic Ducts. 602.4.1 Phenolic. 602.4.2 Gypsum. FIGURE 602.2 TYPICAL LABEL FOR COMBUSTABLE MATERIALS WITHIN DUCTS AND PLENUMS
128	602.4.3 Air Dispersion Systems. 602.4.4 Other Materials. 602.5 Vibration Isolators. 602.6 Corridors. 603.0 Installation of Ducts. 603.1 General. 603.1.1 Pressure Classification. 603.1.2 Air Temperature. 603.1.3 Protection. 603.1.4 Vertical Risers. 603.1.5 Penetrations. FIGURE 602.5 VIBRATION ISOLATOR DETAILS
129	603.2 Under Floor or Crawl Space. 603.3 Metal Ducts. 603.3.1 Earthquake Loads. 603.4 Flexible Air Ducts. FIGURE 603.1 TYPICAL LABELS FOR FACTORY-MADE AIR DUCTS
130	603.4.1 Length Limitation. 603.4.2 Flexible Air Connectors. 603.5 Plastic Ducts. 603.6 Protection of Ducts. 603.7 Support of Ducts. 603.7.1 Metal Ducts. 603.7.1.1 Rectangular Ducts. 603.7.1.2 Horizontal Round Ducts. 603.7.1.3 Tight-Fitting Around the Perimeter. 603.7.1.4 Size of Circular Bands. 603.7.1.5 Connection. 603.7.2 Flexible Air Ducts. 603.7.3 Other Ducts. 603.8 Protection Against Flood Damage. FIGURE 603.7 FLEXIBLE DUCT SUPPORT
131	603.9 Joints and Seams of Ducts. 603.9.1 Closure Systems. 603.9.2 Duct Leakage Tests. TABLE 603.9.1 CLOSURE MARKINGS FIGURE 603.9A RESIDENTIAL ROUND DUCT CONNECTIONS FIGURE 603.9B JOINTS AND CONNECTIONS
132	603.10 Cross Contamination. 603.11 Underground Installation. 603.12 Air Dispersion Systems. 603.13 Clearances. 603.13.1 General. 603.13.2 Supply Air Ducts to Listed Furnaces. 603.13.3 Supply Air Ducts to Unlisted Furnaces. 603.13.4 Furnace Plenums and Air Ducts. 603.13.5 Duct Furnaces. 603.13.6 Fuel-Burning Kilns. FIGURE 603.11 DETAIL OF EMBEDDED DUCT
133	604.0 Furnace Plenums and Ducts Used in Fuel-Gas Appliances. 604.1 Furnace Plenums and Air Ducts. 604.2 Supplied as a Part of Furnace. 604.3 Not Supplied with the Furnace. 604.4 Return Air. 605.0 Insulation of Ducts. 605.1 General. 605.1.1 Within Ducts or Plenums. 605.1.2 Duct Coverings and Linings.
134	606.0 Smoke Dampers, Fire Dampers, and Ceiling Dampers. 606.1 Smoke Dampers. 606.2 Fire Dampers. 606.3 Ceiling Radiation Dampers. 606.4 Multiple Arrangements. 606.5 Access and Identification. 606.6 Freedom from Interference.
135	606.7 Temperature Classification of Operating Elements. 607.0 Ventilating Ceilings. 607.1 General. 607.2 Requirements. 608.0 Use of Under-Floor Space as Supply Plenum for Dwelling Units. 608.1 General. 608.2 Dwelling Units. FIGURE 606.5 TYPICAL FIRE DAMPER DETAILS FIGURE 607.2 VENTILATING CEILING REQUIREMENTS
136	608.3 Enclosed. 608.4 Flammable Materials. 608.5 Access. 608.6 Automatic Control. 608.7 Temperature Limit. 608.8 Noncombustible Receptacle. 608.8.1 Location. 608.8.2 Area. 608.8.3 Perimeter. 608.9 Floor Registers. 608.10 Exterior Wall and Interior Stud Partitions. 608.11Wall Register. 608.12 Distance from Combustible. 608.13 Vapor Barrier. 608.14 Prohibited. 609.0 Automatic Shutoffs. 609.1 Air-Moving Systems and Smoke Detectors. FIGURE 608.2 UNDER-FLOOR SPACE AS SUPPLY PLENUM
137	FIGURE 609.1 PROPER LOCATION OF SMOKE DETECTOR IN SUPPLY DUCT
138	CHAPTER 7 COMBUSTION AIR 701.0 General. FIGURES FIGURE 701.0B THE “VENTURI” EFFECT
139	701.1 Applicability. FIGURE 701.1A FAN-ASSISTED-TYPE FURNACES
140	701.1.1 Other Types of Appliances. 701.2 Pressure Difference. 701.3 Makeup Air. 701.4 Indoor Combustion Air. FIGURE 701.1B DIRECT VENT APPLIANCE
141	701.4.1 Standard Method. 701.4.2 Known Air Infiltration Rate Method.
142	701.5 Indoor Opening Size and Location.
143	FIGURE 701.5 ALL COMBUSTION AIR FROM ADJACENT INDOOR SPACES THROUGH INDOOR COMBUSTION AIR OPENINGS FIGURE 701.5A TWO OPENINGS TO INDOORS EACH SIZED AT 1 SQ IN/1,OOO BTU/H MINIMUM 100 SQ IN, EACH
144	701.6 Outdoor Combustion Air. 701.6.1 Two Permanent Openings Method.
145	701.6.2 One Permanent Opening Method. FIGURE 701.6.1(1) ALL COMBUSTION AIR FROM OUTDOORS – INLET AIR FROM VENTILATED CRAWL SPACE AND OUTLET AIR TO VENTILATED ATTIC FIGURE 701.6.1(2) ALL COMBUSTION AIR FROM OUTDOORS THROUGH VENTILATED ATTIC FIGURE 701.6.1(3) ALL COMBUSTION AIR FROM OUTDOORS THROUGH HORIZONTAL DUCTS
146	701.7 Combination Indoor and Outdoor Combustion Air. 701.7.1 Indoor Openings. 701.7.2 Outdoor Opening(s) Location. 701.7.3 Outdoor Opening(s) Size. FIGURE 701.6.2 ALL COMBUSTION AIR FROM OUTDOORS THROUGH SINGLE COMBUSTION AIR OPENING
147	701.8 Engineered Installations. 701.9 Mechanical Combustion Air Supply.
148	701.9.1 Exhaust Fans. 701.9.2 Interlock. 701.9.3 Specified Combustion Air. 701.10 Louvers, Grilles, and Screens. 701.10.1 Minimum Screen Mesh Size. 701.10.2 Motorized Louvers.
149	701.11 Combustion Air Ducts. FIGURE 701.11A BLOCKING FIGURE 701.11B COMBUSTION AIR PATHWAY
150	701.12 Dampers Prohibited. 702.0 Extra Device or Attachment. 702.1 General.
152	CHAPTER 8 CHIMNEYS AND VENTS 801.0 General. 801.1 Applicability. 801.2 Venting of Gas Appliances. 801.3 Appliances Fueled by Other Fuels. 802.0 Venting of Appliances. 802.1 Listing. 802.1.1 Installation. 802.1.2 Prohibited Discharge. 802.2 Connection to Venting Systems. 802.2.1 Appliances Not Required to be Vented. 802.2.2 Maximum Input Rating. 802.2.3 Adjacent Room or Space. 802.2.4 Ventilating Hoods. TABLES FIGURES
153	802.2.5 Well-Ventilated Spaces. 802.2.6 Direct Vent Appliances. 802.2.7 Appliances with Integral Vents. 802.2.8 Incinerators, Commercial–Industrial. 802.3 Minimum Safe Performance. 802.3.1 Appliance Draft Requirements. FIGURE 802.3COMBUSTION OF NATURAL GAS
154	802.3.2 Appliance Venting Requirements. 802.3.3 Mechanical Draft Systems. 802.3.3.1 Venting. FIGURE 802.3.1 MATCH TEST TO DETERMINE PROPER AND IMPROPER VENTING FIGURE 802.3.3.1 MECHANICALLY VENTED WATER HEATER
155	802.3.3.2 Leakage. 802.3.3.3 Vent Connectors. 802.3.3.4 Operation. 802.3.3.5 Exit Terminals. 802.3.4 Ventilating Hoods and Exhaust Systems. 802.3.5 Circulating Air Ducts, Above-Ceiling Air-Handling Spaces, and Furnace Plenums. 802.3.6 Above-Ceiling or Nonducted Air Handling System. 802.4 Type of Venting System to be Used.
156	802.4.1 Plastic Piping. TABLE 802.4 TYPE OF VENTING SYSTEM TO BE USED COMMENTARY TABLE Appliance Vent Categories
157	802.4.2 Plastic Vent Joints. 802.4.3 Special Gas Vents. 802.5 Masonry, Metal, and Factory-Built Chimneys. 802.5.1 Factory-Built Chimneys. FIGURE 802.4.3a VENT LISTING LABEL FIGURE 802.4.3B VENT SUPPORTS FIGURE 802.5.1A TYPICAL INSTALLATION OF RESIDENTIAL FACTORY-BUILT CHIMNEY
158	FIGURE 802.5.1B ALTERNATE INSTALLATION OF RESIDENTIAL FACTORY-BUILT CHIMNEY FIGURE 802.5.1C ALTERNATE INSTALLATION OF RESIDENTIAL FACTORY-BUILT CHIMNEY FIGURE 802.5.1D HARDWARE FOR A POSITIVE-PRESSURE FACTORY-BUILT CHIMNEY
159	802.5.1.1 Decorative Shrouds. 802.5.2 Metal Chimneys. 802.5.3 Masonry Chimneys. 802.5.4 Termination. 802.5.4.1 Medium-Heat Gas Appliances. 802.5.4.2 Chimney Height. 802.5.4.3 Decorative Shrouds. FIGURE 802.5.3 TYPICAL INSTALLATION USING TYPE B VENT TO LINE CHIMNEY
160	802.5.5 Size of Chimneys. FIGURE 802.5.4 TYPICAL TERMINATION LOCATIONS FOR CHIMNEYS AND SINGLE-WALL METAL PIPES SERVING RESIDENTIAL-TYPE AND LOW-HEAT APPLIANCE
161	802.5.6 Inspection of Chimneys or Vents. 802.5.7 Inspection of Chimneys. 802.5.7.1 Standard. 802.5.7.2 Cleanouts. 802.5.7.3 Existing Chimney. 802.5.8 Chimney Serving Appliances Burning Other Fuels. 802.5.8.1 Gas and Liquid Fuel-Burning Appliances. 802.5.8.2 Gas and Solid Fuel-Burning Appliances. 802.5.8.3 Combination Gas- and Oil-Burning Appliances. 802.5.9 Support of Chimneys. 802.5.10 Cleanouts. FIGURE 802.5.5 CUSTOMIZED VENT KIT
162	802.5.11 Space Surrounding Lining or Vent. 802.5.11.1 Combustion Air. 802.6 Gas Vents. FIGURE 802.5.7 COMMON CHIMNEY TROUBLES
163	FIGURE 802.6A CONSTRUCTION OF DOUBLE-WALL TYPE B GAS VENT FIGURE 802.6B TYPICAL TYPE B GAS VENT: SINGLE APPLIANCE INSTALLATION FIGURE 802.6C TYPICAL TYPE B-W GAS VENT INSTALLATION
164	802.6.1 Gas Vent Termination. TABLE 802.6.1 ROOF PITCH HEIGHT FIGURE 802.6.1 TERMINATION LOCATIONS FOR GAS VENTS WITH LISTED CAPS 12 INCHES OR LESS IN SIZE NOT LESS THAN 8 FEET FROM A VERTICAL WALL
165	802.6.1.1 Insulation Shield. 802.6.2 Size of Gas Vents. 802.6.2.1 Category I Appliances. 802.6.2.2 Vent Offsets. 802.6.2.3 Category II, Category III, and Category IV Appliances. FIGURE 802.6.1A OUTSIDE WALL AIR SUPPLY IN MULTISTORY BUILDING
166	802.6.2.4 Sizing. 802.6.3 Gas Vents Serving Appliances on More than One Floor. 802.6.3.1 Occupiable Space. 802.6.3.2 Multistory Venting System. 802.6.4 Support of Gas Vents. 802.6.5 Marking. 802.7 Single-Wall Metal Pipe. FIGURE 802.6.3.1 PLAN VIEW OF PRACTICAL SEPARATION METHOD FOR MULTISTORY GAS VENTING FIGURE 802.6.3.2 USE OF MANIFOLDED COMMON VENT CONNECTOR
167	802.7.1 Cold Climate. 802.7.2 Termination. 802.7.3 Installation with Appliances Permitted by Section 802.4. 802.7.3.1 Limitations. 802.7.3.2 Attic or Concealed Space. 802.7.3.3 Clearances. 802.7.3.4 Combustible Exterior Wall. FIGURE 802.7 COMPARISON OF DOUBLE-WALL AND SINGLE-WALL GAS VENT CHARACTERISTICS
168	802.7.3.5 Roof Thimble. 802.7.4 Size of Single-Wall Metal Pipe. 802.7.5 Support of Single-Wall Metal Pipe. 802.7.6 Marking. 802.8 Through-the-Wall Vent Termination. 802.8.1 Mechanical Draft Venting System. TABLE 802.7.3.3 CLEARANCE FOR CONNECTORS
169	802.8.2 Direct Vent Appliance. 802.8.3 Category I through Category IV and Noncategorized Appliances. 802.8.4 Annular Spaces. 802.8.5 Vent Terminals. 802.9 Condensation Drain. TABLE 802.8.2 THROUGH-THE-WALL DIRECT VENT TERMINATION CLEARANCES FIGURE 802.8 EXIT TERMINALS OF MECHANICAL DRAFT AND DIRECT-VENT VENTING SYSTEMS
170	802.9.1 Local Experience. 802.10 Vent Connectors for Category I Appliances. 802.10.1 Materials. 802.10.1.1 Unconditioned Area. 802.10.1.2 Residential-Type Appliances. 802.10.1.3 Nonresidential Low-Heat Appliances. 802.10.1.4 Medium-Heat Appliances. TABLE 802.10.1.3 MINIMUM THICKNESS FOR GALVANIZED STEEL VENT CONNECTORS FOR LOW-HEAT APPLIANCES
171	802.10.2 Size of Vent Connector. 802.10.2.1 Manifold. 802.10.2.2 Size. 802.10.2.3 Height. 802.10.2.4 Size Increase. 802.10.3 Two or More Appliances Connected to a Single Vent. 802.10.3.1 Height of Connector. 802.10.3.2 Pressure. 802.10.4 Clearance. 802.10.5 Joints. TABLE 802.10.1.4 MINIMUM THICKNESS FOR STEEL VENT CONNECTORS FOR MEDIUM-HEAT APPLIANCES
172	802.10.6 Slope. 802.10.7 Length of Vent Connector. 802.10.7.1 Single Wall Connector. 802.10.7.2 Type B Double Wall Connector. 802.10.8 Support. 802.10.9 Chimney Connection. 802.10.10 Inspection. 802.10.11 Fireplaces. 802.10.12 Passage through Ceilings, Floors, or Walls. 802.10.12.1 Medium-Heat Appliances. 802.11 Vent Connectors for Category II, Category III, and Category IV Appliances. 802.12 Draft Hoods and Draft Controls.
173	802.12.1 Installation. 802.12.2 Draft Control Devices. 802.12.3 Additional Devices. 802.12.4 Location. 802.12.5 Positioning. 802.12.6 Clearance. 802.13 Manually Operated Dampers. 802.14 Obstructions.
174	802.15 Automatically Operated Vent Dampers. 802.15.1 Listing. 803.0 Sizing of Category I Venting Systems. COMMENTARY TABLE 1 COMMENTARY TABLE 2 COMMENTARY TABLE 3 FIGURE 802.15 VENT DAMPER
175	803.1 Single Appliance Vent Table 803.1.2(1) through Table 803.1.2(6). 803.1.1 Vent Downsizing. 803.1.2 Elbows. 803.1.3 Zero Lateral. FIGURE 803.1 NO OBSTRUCTIONS FIGURE 803.1.1 DOWNSIZING
176	803.1.4 High-Altitude Installations. 803.1.5 Multiple Input Ratings. 803.1.6 Corrugated Chimney Liner Reduction. 803.1.7 Connection to Chimney Liners. COMMENTARY TABLE FIGURE 803.1.2 ELBOWS FIGURE 803.1.3 NO ELBOWS FIGURE 803.1.7 EXTERIOR CHIMNEYS
177	803.1.8 Vertical Vent Upsizing Using 7 x Rule. 803.1.9 Draft Hood Conversion Accessories. 803.1.10 Chimney and Vent Locations. 803.1.11 Residential and Low-Heat Appliances. 803.1.11.1 Clay Flue Lining. 803.1.11.2 Chimney Lining. 803.1.12 Corrugated Vent Connector Size. 803.1.13 Upsizing. 803.1.14 Single Run of Vent. FIGURE 803.1.8 UPSIZING VERTICAL VENT
178	803.1.15 Interpolation. 803.1.16 Extrapolation. 803.1.17 Engineering Methods. 803.1.18 Height Entries. 803.2 Multiple Appliance Vent Table 803.2(1) through Table 803.2(9). FIGURE 803.1.14 MULTIPLE VERTICAL VENT SIZES
179	803.2.1 Vent Connector Maximum Length. 803.2.2 Vent Connector Exceeding Maximum Length. 803.2.3 Vent Connector Manifolds. 803.2.4 Vent Offsets. 803.2.5 Elbows in Vents. TABLE 803.2.1 VENT CONNECTOR MAXIMUM LENGTH
180	803.2.6 Elbows in Connectors. 803.2.7 Common Vent Minimum Size. 803.2.8 Tee and Wye Fittings. 803.2.9 Size of Fittings. 803.2.10 High-Altitude Installations. 803.2.11 Connector Rise. 803.2.12 Vent Height. 803.2.13 Multistory Installations. 803.2.14 Size of Vents for Multistory Installations. FIGURE 803.2.4A VENT MANIFOLDS FIGURE 803.2.4B VENT OFFSETS
181	803.2.15 Vent Type Multistory Installation. 803.2.16 Offsets in Multistory Installations. 803.2.17 Vertical Vent Size Limitation.
182	803.2.18 Multiple Input Ratings. 803.2.19 Corrugated Metallic Chimney Liner Reduction. 803.2.20 Chimneys and Vents. 803.2.21 Vent Connector Sizing.
183	803.2.22 Combination of Pipe Types and Sizes. 803.2.23 Multiple Connector and Vent Sizes. 803.2.24 Interpolation. 803.2.25 Extrapolation. 803.2.26 Engineering Methods. 803.2.27 Height Entries.
184	FIGURE 803.1.2(6)RANGE OF WINTER DESIGN TEMPERATURES USED IN ANALYZING EXTERIOR MASONRY CHIMNEYS IN THE UNITED STATES
185	TABLE 803.1.2(1) TYPE B DOUBLE-WALL GAS VENT
188	TABLE 803.1.2(2) TYPE B DOUBLE-WALL GAS VENT
190	TABLE 803.1.2(3) MASONRY CHIMNEY
192	TABLE 803.1.2(4) MASONRY CHIMNEY
194	TABLE 803.1.2(5) SINGLE-WALL METAL PIPE OR TYPE B ASBESTOS-CEMENT VENT
195	TABLE 803.1.2(6) EXTERIOR MASONRY CHIMNEY
196	TABLE 803.2(1) TYPE B DOUBLE-WALL VENT
200	TABLE 803.2(2) TYPE B DOUBLE-WALL VENT
202	TABLE 803.2(3) MASONRY CHIMNEY
204	TABLE 803.2(4) MASONRY CHIMNEY
206	TABLE 803.2(5) SINGLE-WALL METAL PIPE OR TYPE B ASBESTOS-CEMENT VENT TABLE 803.2(6) EXTERIOR MASONRY CHIMNEY
207	TABLE 803.2(7) EXTERIOR MASONRY CHIMNEY
208	TABLE 803.2(8) EXTERIOR MASONRY CHIMNEY
209	TABLE 803.2(9)EXTERIOR MASONRY CHIMNEY
210	CHAPTER 9 INSTALLATION OF SPECIFIC APPLIANCES 901.0 General. 901.1 Applicability. 902.0 General. 902.1 Nonindustrial Appliance. 902.2 Combustion Air from Bedroom or Bathroom. 902.3 Added or Converted Appliances. 902.4 Type of Gas(es). 902.5 Safety Shutoff Devices for Unlisted LP-Gas Appliances Used Indoors. 902.6 Fuel Input Rate. 902.7 Use of Air or Oxygen Under Pressure. TABLES FIGURES FIGURE 902.1 PROHIBITED AND ACCEPTABLE LOCATION OF WARM-AIR FURNACES
211	902.8 Building Structural Members. 902.8.1 Structural Capacity. 902.9 Flammable Vapors. 902.10 Solid-Fuel Burning Appliances. 902.11 Combination of Appliances and Equipment. 902.12 Protection of Gas Appliances from Fumes or Gases Other than Products of Combustion. 902.13 Process Air. 902.14 Gas Appliance Pressure Regulators. 902.15 Venting of Gas Appliance Pressure Regulators. FIGURE 902.10 FIREPLACE STOVE REDUCTION CLEARANCES
212	902.16 Bleed Lines for Diaphragm-Type Valves. 903.0 Air-Conditioning Appliances. 903.1 Electric Air Conditioners. 903.2 Gas-Fired Air Conditioners and Heat Pumps. 903.2.1 Independent Gas Piping. 903.2.2 Connection of Gas Engine-Powered Air Conditioners. 903.2.3 Clearances for Indoor Installation. 903.2.4 Assembly and Installation.
213	903.2.5 Refrigeration Coils. 903.2.6 Switches in Electrical Supply Line. 904.0 Central Heating Boilers and Furnaces. 904.1 Location. 904.1.1 Self-Closing Doors. 904.1.2 Gasketing. 904.2 Clearance. 904.2.1 Listed Units. FIGURE 904.0 UPFLOW FURNACE
214	904.2.2 Unlisted Units. 904.2.3 Listed and Unlisted Units. 904.2.4 Front Clearance. 904.2.5 Adjacent to Plaster or Noncombustible Materials. 904.2.6 Interference. 904.2.7 Central Heating Furnaces. 904.3 Assembly and Installation. 904.3.1 Under-Floor Installation. 904.3.1.1 Supported by Ground. 904.3.1.2 Supported from Above. 904.3.1.3 Excavation. 904.4 Temperature or Pressure Limiting Devices. 904.5 Low-Water Cutoff. TABLE 904.2.2 CLEARANCES TO COMBUSTIBLE MATERIAL FOR UNLISTED FURNACES AND BOILERS*
215	904.6 Steam Safety and Pressure Relief Valves. 904.6.1 Discharge. 904.6.2 Size. 904.6.3 End Connections. 904.7 Refrigeration Coils. 904.8 Cooling Units Used with Heating Boilers. 904.8.1 Exposed to Refrigerated Air Circulation. 904.9 Furnace (Upright and Horizontal). 904.10 Solid-Fuel-Fired Furnaces. 904.11 Oil-Fired Central Furnaces. 904.12 Commercial or Industrial Gas Heaters. 904.13 Electric Central Furnaces. 905.0 Duct Furnaces. 905.1 Clearances.
216	905.2 Installation of Duct Furnaces. 905.3 Access Panels. 905.4 Location of Draft Hoods and Controls. 905.5 Circulating Air. 905.6 Duct Furnaces Used with Refrigeration Systems. 905.6.1 In Conjunction with Cooling Appliances. 905.6.2 Located Upstream from Cooling Coils. 905.6.3 Heat Exchangers. 905.7 Installation in Commercial Garages and Aircraft Hangars. 905.8 Electric Duct Heaters. 905.8.1 Installation. 905.8.2 Clearance. 906.0 Floor Furnaces. 906.1 Installation. FIGURE 905.0 DUCT FURNACE
217	906.2 Temperature Limit Controls. 906.3 Combustion and Circulating Air. 906.4 Placement. 906.5 Bracing. 906.6 Support. 906.7 Clearance. 906.8 Access. 906.9 Seepage Pan. 906.10 Wind Protection. 906.11 Upper Floor Installations. 906.12 First Floor Installation.
218	906.13 Oil-Fired Floor Furnaces. 907.0 Wall Furnaces. 907.1 Installation. 907.1.1 Unlisted Wall Furnaces. 907.1.2 Vented Wall Furnaces. 907.1.3 Direct Vent Wall Furnaces. 907.1.4 Panels, Grilles, and Access Doors. FIGURE 906.12 AEXAMPLES OF FLOOR FURNACES FIGURE 906.12B FLAT FLOOR FURNACE – MINIMUM CLEARANCE FIGURE 906.12C WALL REGISTER FLOOR FURNACE – MINIMUM CLEARANCE FIGURE 906.12D FLOOR FURNACE – REQUIRED ACCESS AND CLEARANCES FIGURE 906.12E FLOOR FURNACE ON SLAB – PROHIBITED
219	907.2 Location. 907.3 Combustion and Circulating Air. 907.4 Oil-Fired Wall Furnaces. 908.0 Clothes Dryers. 908.1 Electric Clothes Dryers. 908.2 Gas-Fired Clothes Dryers. 908.2.1 Clearance. 908.2.2 Exhausting to the Outdoors. 908.2.3 Multiple-Family or Public Use. 909.0 Conversion Burners. 909.1 General. 910.0 Burner Assemblies. 910.1 Oil Burners. 910.2 Gas Burners. 911.0 Decorative Appliances for Installation in Vented Fireplaces. FIGURE 907.1.2 INSTALLATION OF TYPE B-W GAS VENTS FOR VENTED WALL FURNACES
220	911.1 Prohibited Installations. 911.2 Installation. 911.2.1 Listed Decorative Appliance. 911.2.2 In Manufactured Homes. 911.2.3 Unlisted Decorative Appliance. 911.3 Fireplace Screens. 912.0 Gas Fireplaces, Vented. 912.1 Prohibited Installations. 912.2 Installation. TABLE 911.2 FREE OPENING AREA OF CHIMNEY DAMPER FOR VENTING FLUE GASES FROM UNLISTED DECORATIVE APPLIANCES FOR INSTALLATION IN VENTED FIREPLACES FIGURE 911.2 DECORATIVE APPLIANCES
221	912.3 Combustion and Circulating Air. 913.0 Factory-Built Fireplaces and Fireplace Stoves. 913.1 Factory-Built Fireplaces. 913.1.1 Gasketed Fireplace Doors. 913.2 Fireplace Stoves. 913.3 Fireplace Accessories. 914.0 Non-Recirculating Direct Gas-Fired Industrial Air Heaters. 914.1 Application. 914.2 Prohibited Installations. 914.3 Installation. 914.3.1 Fresh Air Ventilation. 914.3.2 Access Required. 914.4 Clearance from Combustible Materials. 914.5 Air Supply. 914.6 Atmospheric Vents, Gas Reliefs, or Bleeds. FIGURE 914.1 DIRECT-FIRED MAKEUP AIR HEATER
222	914.7 Relief Openings. 914.7.1 Infiltration Rate. 914.7.2 Louver or Gravity Dampers. 914.8 Purging. 915.0 Recirculating Direct Gas-Fired Industrial Air Heaters. 915.1 Application. 915.2 Prohibited Installations. 915.3 Installation. 915.4 Clearance from Combustible Materials. 915.5 Air Supply. 915.6 Atmospheric Vents, Gas Reliefs, or Bleeds. 915.7 Relief Openings. 915.7.1 Infiltration Rate. 915.7.2 Louver or Gravity Dampers. 915.8 Purging. 916.0 Room Heaters. 916.1 Electric Room Heaters.
223	916.2 Gas-Fired Room Heaters. 916.2.1 Prohibited Installations. 916.2.1.1 Unvented Room Heaters. 916.2.2 Installations in Institutions. 916.2.3 Clearance. 916.2.4 Wall-Type Room Heaters. 916.3 Solid-Fuel-Type Room Heaters. 917.0 Unit Heaters. 917.1 Support. 917.2 Clearance. 917.2.1 Floor-Mounted-Type Unit Heaters. 917.3 Combustion and Circulating Air.
224	917.4 Ductwork. 917.5 Installation in Commercial Garages and Aircraft Hangars. 917.6 Oil-Fired Unit Heaters. 918.0 Food Service Appliance, Floor-Mounted. 918.1 Clearance for Listed Appliances. 918.2 Clearance for Unlisted Appliances. 918.3 Mounting on Combustible Floors. 918.3.1 Not Listed for Mounting on Combustible Floors. 918.4 Installation on Noncombustible Floors. 918.5 Combustible Material Adjacent to Cooking Top. 918.6 Use with Casters.
225	918.7 Level Installation. 918.8 Ventilation. 919.0 Food Service Appliances, Counter Appliances. 919.1 Vertical Clearance. 919.2 Clearance for Listed Appliances. 919.3 Clearance for Unlisted Appliances. 919.4 Mounting of Unlisted Appliances. 920.0 Household Cooking Appliances. 920.1 Electric Household Cooking Appliances. 920.2 Gas-Fired Household Cooking Appliances. 920.3 Floor-Mounted Units. 920.3.1 Clearance from Combustible Material. 920.3.2 Vertical Clearance Above Cooking Top.
226	920.4 Built-In Units. 920.4.1 Installation. 920.4.2 Vertical Clearance. 920.4.3 Level Installation. 921.0 Cooking Appliances Listing. 921.1 Commercial Electric Ranges. 921.2 Commercial Wood-Fired Baking Ovens. 921.3 Oil-Burning Ranges. FIGURE 920.4.2 KITCHEN RANGE HOOD AND DUCT
227	922.0 Open-Top Broiler Units. 922.1 Listed Units. 922.2 Unlisted Units. 922.3 Protection Above Domestic Units. 922.4 Commercial Units. 923.0 Outdoor Cooking Appliances. 923.1 Listed Units. 923.2 Unlisted Units. 924.0 Illuminating Appliances. 924.1 Clearances for Listed Appliances. 924.2 Clearances for Unlisted Appliances. 924.2.1 Open-Flame Type. 924.3 Mounting on Buildings. TABLE 924.2.1 CLEARANCES FOR UNLISTED OUTDOOR OPEN-FLAME ILLUMINATING APPLIANCES
228	924.4 Mounting on Posts. 924.5 Appliance Pressure Regulators. 925.0 Incinerators and Crematories. 925.1 Field Constructed Commercial-Industrial Incinerators. 925.2 Factory-Built Commercial Crematories. 925.3 Residential Incinerators. 926.0 Infrared Heaters. 926.1 Support. 926.2 Clearance. 926.3 Combustion and Ventilation Air. 926.3.1 Exhaust Openings. 926.4 Installation in Commercial Garages and Aircraft Hangars. 927.0 Pool Heaters. 927.1 Location. 927.2 Clearance. 927.3 Temperature or Pressure-Limiting Devices. 927.3.1 Pressure Relief Valve. 927.4 Bypass Valves. 927.5 Venting.
229	928.0 Refrigerators. 928.1 Clearance. 928.2 Venting or Ventilating Kits Approved for Use with a Refrigerator. 929.0 Gas-Fired Toilets. 929.1 Clearance. 929.2 Installation on Combustible Floors. 929.3 Vents. 930.0 Appliances for Installation in Manufactured Housing. 930.1 General. 931.0 Small Ceramic Kilns. 931.1 General. 931.2 Installation. 931.3 Fuel-Gas Controls. 931.4 Electrical Equipment. 931.5 Installations Inside Buildings. 931.5.1 Kiln Clearances. 931.5.2 Hoods. FIGURE 927.4 BYPASS LINE WITH VALVE
230	931.5.3 Gravity Ventilation Ducts. 931.5.4 Makeup Air. 931.6 Exterior Installations. 932.0 Outdoor Open Flame Decorative Appliances. 932.1 General. 932.1.1 Listed Units. 932.1.2 Unlisted Units. 932.1.3 Connection to the Piping System. 933.0 Evaporative Cooling Systems. 933.1 General. 933.2 Location. 933.3 Access, Inspection, and Repair. 933.4 Installation. 933.4.1 Modifications to the Supporting Structure. 933.4.2 On the Ground. 933.4.3 On a Platform. 934.0 Refrigeration Appliances. 934.1 Self-Contained Refrigerators and Freezers. 934.2 Unit Coolers. 934.3 Self-Contained Mechanical Refrigeration Systems. 935.0 Ductless Mini-Split Systems Installation. 935.1 General. 936.0 Air Filter Appliances. 936.1 Electrostatic Air Cleaners. 936.2 High-Efficiency Particulate Air Filter Units.
231	937.0 Gaseous Hydrogen Systems. 937.1 General. 938.0 Compressed Natural Gas (CNG) Vehicular Fuel Systems. 938.1 General. FIGURE 935.1 DUCTLESS MINI-SPLIT
232	CHAPTER 10 BOILERS AND PRESSURE VESSELS 1001.0 General. 1001.1 Applicability. 1001.2 Boiler Rooms and Enclosures. 1001.3 Air for Combustion and Ventilation. 1001.4 Drainage. 1001.5 Mounting. TABLES FIGURES
233	1001.5.1 Floors. 1001.6 Chimneys or Vents. 1002.0 Standards. 1002.1 General. FIGURE 1001.5ABOILER FOUNDATION SIZES FIGURE 1001.5B SPRING MOUNT – EXAMPLE OF VIBRATION ISOLATION STRATEGY
234	1002.2 Oil-Burning Boilers. 1002.2.1 Listing & Labeling. 1002.2.2 Installation. FIGURE 1002.1 GAS-FIRED BOILER
235	1002.3 Electric Boilers. 1002.4 Solid-Fuel-Fired Boilers. 1002.5 Dual Purpose Water Heater. 1003.0 Detailed Requirements. 1003.1 Safety Requirements. 1003.2 Controls. 1003.2.1 Automatic Boilers. 1003.3 Gauges.
236	1003.4 Stack Dampers. 1003.5 Welding. 1004.0 Expansion Tanks. FIGURE 1003.3A SIGHT GLASS LEVELS FIGURE 1003.3B TRIDICATORS (COMBINATION GUAGES) FIGURE 1003.4 AUTOMATIC VENT DAMPER
237	1004.1 General. FIGURE 1004.1A EXPANSION TANK SUPPORT TABLE FIGURE 1004.1B EXPANSION TANK SUPPORT
238	1004.2 Open-Type Expansion Tanks. 1004.3 Closed-Type Systems. FIGURE 1004.2 OPEN EXPANSION TANK FIGURE 1004.3A STEEL EXPANSION TANK FIGURE 1004.3B STEEL EXPANSION TANK
239	1004.4 Minimum Capacity of Closed-Type Tank. TABLE 1004.4(1) EXPANSION TANK CAPACITIES FOR GRAVITY HOT WATER SYSTEMS FIGURE 1004.3C DIAPHRAGM TANK FIGURE 1004.3D DIAPHRAGM EXPANSION TANK FIGURE 1004.3E DIAPHRAGM EXPANSION TANK
240	1005.0 Safety or Relief Valve Discharge. 1005.1 General. TABLE 1004.4(2) EXPANSION TANK CAPACITIES FOR FORCED HOT WATER SYSTEMS
241	1005.2 Discharge Piping. 1005.3 Splash Shield. 1005.4 Hazardous Discharge. FIGURE 1005.1A THE PLATE AFFIXED TO THE BOILER SHOWS MIN. RELIEF VALVE CAP (MINIMUM RELIEF VALVE CAPACITY) OF 764 MBH FIGURE 1005.1BA METAL PLATE SHOWING PRESSURES FIGURE 1005.2A PERIODIC TESTING OF RELIEF VALVE
242	1005.5 Vacuum Relief Valve. 1006.0 Shutoff Valves. 1006.1 General. 1007.0 Gas-Pressure Regulators. 1007.1 General. FIGURE 1005.2B WATER AND SCALE BUILDUP ON FLOOR FIGURE 1007.1 GAS PRESSURE REGULATOR
243	1008.0 Low-Water Cutoff. 1008.1 General. FIGURE 1008.1A FLOAT LWCO FIGURE 1008.1B FLOAT TYPE LWCO FIGURE 1008.1C INSTALLATION OF PROBE OF ELECTRONIC LWCO FIGURE 1008.1D ELECTRONIC LWCO
244	1009.0 Combustion Regulators – Safety Valves. 1009.1 General. FIGURE 1009.1 TEMPERATURE AND PRESSURE-RELIEF VALVES
245	1010.0 Clearance for Access. 1010.1 General. 1010.2 Power Boilers. 1010.3 Steam-Heating Boilers, Hot Water Boilers, and Power Boilers. INSPECTION CHECKLIST
246	1010.4 Package Boilers, Steam-Heating Boilers, and Hot-Water-Heating Boilers. 1011.0 Boilers, Stokers, and Steam Generators. 1011.1 General. 1012.0 Operating Adjustments and Instructions. 1012.1 General. 1013.0 Inspections and Tests. 1013.1 General. 1013.2 Operating Permit. 1013.3 Maintenance Inspection. 1013.4 Power and Miniature Boilers. 1013.5 Steam-Heating and Water-Heating Boilers. 1013.6 Automatic Steam-Heating Boilers. FIGURE 1010.1 SAMPLE BOILER LISTING PLATE SHOWING MINIMUM CLEARANCES FROM BOILER TO COMBUSTIBLE MATERIALS
247	1013.7 Unfired Pressure Vessels. 1014.0 Operation and Maintenance of Boilers and Pressure Vessels. 1014.1 General.
248	TABLE 1003.2.1 CONTROLS AND LIMIT DEVICES FOR AUTOMATIC BOILERS
250	CHAPTER 11 REFRIGERATION 1101.0 General. 1101.1 Applicability. 1101.2 Equipment. Part I – Refrigeration Systems. 1102.0 Refrigeration Systems. TABLES FIGURES FIGURE 1102.0 REFRIGERATION COMPONENTS
251	1102.1 General. 1102.2 Ammonia Refrigeration Systems. 1102.3 Refrigerants. 1103.0 Classification. 1103.1 Classification of Refrigerants. 1103.1.1 Safety Group. 1103.2 Classification of Refrigeration Systems. 1103.2.1 High-Probability System. 1103.2.2 Low-Probability System. 1103.3 Higher Flammability Refrigerants. FIGURE 1102.3 REFRIGERANT CLASSIFICATION
252	1104.0 Requirements for Refrigerant and Refrigeration System Use. 1104.1 System Selection. 1104.2 Refrigerant Concentration Limit. 1104.2.1 Volume Calculations. 1104.2.2 Nonconnecting Spaces. 1104.2.3 Ventilated Spaces. 1104.2.3.1 Closures. 1104.2.3.2 Plenums. 1104.2.3.3 Supply and Return Ducts. 1104.3 Institutional Occupancies. 1104.4 Industrial Occupancies and Refrigerated Rooms.
253	1104.5 Flammable Refrigerants. 1104.6 Applications for Human Comfort and for Nonindustrial Occupancies. 1104.7 Refrigerant Type and Purity. 1104.7.1 Recovered Refrigerants. 1104.7.2 Recycled Refrigerants. 1104.7.3 Reclaimed Refrigerants. 1104.7.4 Mixing. 1104.8 Changing Refrigerants. 1105.0 General Requirements. 1105.1 Human Comfort. 1105.2 Supports and Anchorage. 1105.3 Access.
254	1105.4 Illumination and Service Receptacles. 1105.5 Ventilation of Rooms Containing Condensing Units. 1105.5.1 Permanent Gravity Ventilation Openings. 1105.5.2 Mechanical Exhaust System. 1105.6 Prohibited Locations. 1105.7 Condensate. 1105.8 Defrost. 1105.9 Overflows. 1105.10 Condensate, Defrost, and Overflow Disposal. 1105.11 Refrigerant Port Protection. 1105.12 Storage. 1105.12.1 Quantity. 1106.0 Refrigeration Machinery Rooms. 1106.1 Where Required. 1106.1.1 Quantity. 1106.1.2 Equipment. 1106.1.3 A1 System.
255	1106.1.4 A1 Refrigerant. 1106.2 Refrigeration Machinery Room, General Requirements. 1106.2.1 Access. 1106.2.2 Openings. 1106.2.2.1 Detectors and Alarms. 1106.2.2.2 Refrigerant Detectors. 1106.2.3 Mechanical Ventilation. 1106.2.4 Ventilation. 1106.2.5 Emergency Ventilation-Required Airflow. 1106.2.5.1 Ventilation – A1, A2, A3, B1, B2L, B2 and B3 refrigerants.
256	1106.2.5.2 Ventilation – Group A2L Refrigerants. 1106.3 Normal Operation. 1106.4 Natural Ventilation. 1106.5 Combustion Air. 1106.6 Airflow. 1106.7 Ventilation Intake. TABLE 1106.2.5.2 REQUIRED AIRFLOW FOR GROUP A2L REFRIGERANTS
257	1106.8 Maximum Temperature. 1106.9 Refrigerant Parts in Air Duct. 1106.10 Dimensions. 1106.11 Restricted Access. 1106.12 Exits. 1107.0 Machinery Room, Special Requirements. 1107.1 General. 1107.1.1 Flame-Producing Devices. 1107.1.2 Doors. 1107.1.3 Walls, Floors, and Ceilings. 1107.1.4 Machinery Rooms. 1107.1.5 Exterior Openings. 1107.1.6 Sealing. 1107.1.7 Group A2L and B2L Refrigerants. 1107.1.7.1 Mechanical Ventilation. 1107.1.7.2 Refrigeration Detectors. 1107.1.7.3 Machinery Rooms. 1107.1.8 Group A2, A3, B2, or B3 Refrigerants. 1107.1.9 Refrigeration Systems. 1107.1.10 Remote Control. 1108.0 Refrigeration Machinery Room Equipment and Controls. 1108.1 General. 1108.2 Electrical. 1108.3 Emergency Shut-off.
258	1108.4 Installation, Maintenance, and Testing. 1108.5 Emergency Pressure Control System. 1109.0 Refrigeration Piping, Containers, and Valves. 1109.1 Materials. 1109.1.1 Copper and Copper Alloy Pipe. 1109.1.2 Copper Linesets. 1109.1.3 Iron and Steel. 1109.1.4 Prohibited Contact. 1109.2 Joints. 1109.3 Penetration of Piping. 1109.4 Location of Refrigeration Piping. 1109.4.1 Protection from Mechanical Damage. 1109.5 Underground Piping. 1109.5.1 Piping in Concrete Floors. 1109.6 Support. 1109.7 Pipe Enclosure.
259	1109.8 Visual Inspection. 1109.9 Condensation. 1109.10 Identification. 1110.0 Valves. 1110.1 More than 6.6 Pounds of Refrigerant. 1110.2 More than 110 Pounds of Refrigerant. 1110.3 Support. 1110.4 Access. 1110.5 Identification. 1111.0 Pressure-Limiting Devices. 1111.1 Where Required. 1111.2 Setting.
260	1111.3 Location. 1111.4 Emergency Stop. 1112.0 Pressure-Relief Devices. 1112.1 General. 1112.2 Positive Displacement Compressor. 1112.3 Liquid-Containing Portions of Systems. 1112.4 Evaporators. 1112.5 Hydrostatic Expansion. 1112.5.1 Hydrostatic Expansion During Normal Operation.
261	1112.5.2 Hydrostatic Expansion During Maintenance. 1112.6 Actuation. 1112.7 Stop Valves Prohibited. 1112.8 Location. 1112.9 Materials. 1112.10 Pressure-Relief Device Settings. 1112.10.1 Rupture Member Setting. 1112.11 Discharge from Pressure-Relief Devices. 1112.11.1 Discharging Location Interior to Building. 1112.11.2 Discharging Location Exterior to Building.
262	1112.11.3 Internal Relief. 1112.11.4 Discharge Location, Special Requirements. 1112.11.4.1 Water (R-718). 1112.12 Discharge Piping. 1112.12.1 Piping Connection. 1112.12.2 Pipe Size. 1112.12.3 Maximum Length. 1112.12.4 Design Back Pressure. TABLE 1112.12.3 ATMOSPHERIC PRESSURE AT NOMINAL INSTALLATION ELEVATION (Pa)
263	1112.12.5 Simultaneous Operation. 1112.13 Rating of Pressure-Relief Device. 1112.14 Rating of Rupture Members and Fusible Plugs. 1113.0 Overpressure Protection. 1113.1 General. 1113.2 Type of Protection. 1113.3 Discharging into Lowside of System. 1113.4 Parallel Pressure-Relief Devices. 1113.5 Discharge Capacity.
264	1113.6 Three-Way Valve. 1114.0 Special Discharge Requirements. 1114.1 General. 1114.2 Design Requirements. 1114.3 Testing. 1115.0 Labeling and Identification. 1115.1 General. 1115.2 Volume and Type. 1115.3 Permanent Sign. 1115.4 Marking of Pressure-Relief Devices. 1115.4.1 Rupture Members. 1115.4.2 Fusible Plugs. 1116.0 Testing of Refrigeration Equipment. TABLE 1113.5 RELIEF DEVICES CAPACITY FACTOR
265	1116.1 Factory Tests. 1116.1.1 Testing Procedure. 1116.1.2 Applied Pressure. 1116.1.3 Design Pressure of 15 psig or Less. 1116.2 Field Tests. 1116.3 Test Gases. 1116.4 Declaration. TABLE 1116.2 FIELD LEAK TEST PRESSURES (psig)
266	1116.5 Brine Systems. 1117.0 Refrigerant-Containing Pressure Vessels. 1117.1 Inside Dimensions 6 Inches or Less. 1117.1.1 Pressure-Relief Device. 1117.1.2 Fusible Plug. 1117.2 Inside Dimensions More than 6 Inches. 1117.3 Pressure Vessels for 15 psig or Less. 1118.0 Maintenance and Operation. 1118.1 General. Part II – Cooling Towers. 1119.0 General. 1119.1 Applicability.
267	1120.0 Support and Anchorage. 1120.1 General. 1121.0 Drainage. 1121.1 General. 1122.0 Chemical Treatment Systems. 1122.1 General. 1122.2 Automated Control of Cycles of Concentration. 1123.0 Location. 1123.1 General. 1124.0 Electrical. 1124.1 General. 1125.0 Refrigerants and Hazardous Fluids. 1125.1 General. 1126.0 Drift Eliminators. 1126.1 General.
268	TABLE 1102.3 REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES
273	TABLE 1104.1 PERMISSIBLE REFRIGERATION SYSTEMS
274	CHAPTER 12 HYDRONICS 1201.0 General. 1201.1 Applicability. 1201.2 Insulation. 1201.3 Water Hammer. 1201.4 Terminal Units. 1201.5 Return-Water Low-Temperature Protection. 1202.0 Protection of Potable Water Supply. 1202.1 Prohibited Sources. 1202.2 Chemical Injection. 1202.3 Compatibility. TABLES FIGURES FIGURE 1201.2 FOAM TUBE INSULATION
275	1203.0 Capacity of Heat Source. 1203.1 Heat Source. 1203.2 Dual Purpose Water Heater. 1203.3 Tankless Water Heaters. 1204.0 Identification of a Potable and Nonpotable Water System. 1204.1 General. 1204.2 Color and Information. 1204.3 Potable Water. 1204.4 Nonpotable Water. 1204.5 Location of Piping Identification. 1204.6 Flow Directions. 1205.0 Installation, Testing, and Inspection. 1205.1 Operating Instructions. 1205.2 Pressure Testing. TABLE 1203.2 WATER HEATERS TABLE 1204.3 MINIMUM LENGTH OF COLOR FIELD AND SIZE OF LETTERS
276	1205.3 Flushing. 1206.0 Pressure and Safety Devices. 1206.1 General. 1206.2 Discharge Piping. 1207.0 Heating Appliances and Equipment. 1207.1 General. 1207.2 Boilers. 1207.2.1 Condensing Boilers. 1207.2.2 Noncondensing Boilers. 1207.3 Dual-Purpose Water Heaters. 1207.3.1 Temperature Limitations.
277	1207.4 Solar Heat Collector Systems. 1208.0 Circulators and Pumps. 1208.1 General. 1208.2 Mounting. 1209.0 Expansion Tanks. 1209.1 General. 1209.2 Installation. 1209.3 Open-Type Expansion Tanks. 1209.4 Closed-Type Tanks. 1209.5 Sizing. 1210.0 Materials. 1210.1 Piping, Tubing, and Fittings. FIGURE 1207.3.1 BURN CHART
278	1210.2 Expansion and Contraction. 1210.3 Hangers and Supports. FIGURE 1209.4 CLOSED EXPANSION TANKS FIGURE 1210.3A SAMPLES OF PIPE HANGERS FIGURE 1210.3B TRAPEZE TRANSVERSE AND LONGITIDINAL BRACING FIGURE 1210.3C SWING JOINT
279	1210.4 Oxygen Diffusion Corrosion. TABLE 1210.1 MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS FIGURE 1210.3D EXAMPLES OF EXPANSION LOOPS
280	1211.0 Joints and Connections. 1211.1 General. 1211.2 Chlorinated Polyvinyl Chloride (CPVC) Pipe. FIGURE 1211.1A BEND RADIUS FIGURE 1211.1B INSIDE AND OUTSIDE LOOP WALLS FIGURE 1211.1C KEYHOLE LOOP
281	1211.3 CPVC/AL/CPVC Plastic Pipe and Joints. 1211.4 Copper or Copper Alloy Pipe and Tubing. FIGURE 1211.3A COMPLETED FLARED JOINT
282	1211.5 Cross-Linked Polyethylene (PEX) Pipe. 1211.6 Cross-Linked Polyethylene/Aluminum/Cross-Linked Polyethylene (PEX-AL-PEX) Pipe. 1211.7 Ductile Iron Pipe. FIGURE 1211.3B MECHANICALLY FORMED TEE FITTINGS
283	1211.8 Polyethylene (PE) Plastic Pipe/Tubing. 1211.9 Polyethylene/Aluminum/Polyethylene (PE-ALPE). 1211.10 Polyethylene of Raised Temperature (PE-RT). 1211.11 Polypropylene (PP) Pipe. 1211.12 Polyvinyl Chloride (PVC) Pipe.
284	1211.13 Steel Pipe and Tubing. 1211.14 Joints Between Various Materials. 1211.14.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. 1211.14.2 Plastic Pipe to Other Materials. 1212.0 Valves. 1212.1 General. 1212.2 Where Required. 1212.3 Heat Exchanger. 1212.4 Pressure Vessels. 1212.5 Pressure Reducing Valves. 1212.6 Equipment, Components, and Appliances. 1212.7 Expansion Tank. 1212.8 Flow Balancing Valves.
285	1212.9 Mixing or Temperature Control Valves. 1212.10 Thermosiphoning. 1212.11 Air Removal Device or Air Vents. 1213.0 System Controls. 1213.1 Water Temperature Controls. 1213.2 Operating Steam Controls. 1213.2.1 Water-Level Controls. 1213.3 Occupied Spaces. 1213.4 Simultaneous Operation. 1213.5 Temperature Reading. 1214.0 Pressure and Flow Controls. 1214.1 Balancing. 1214.2 Low-Water Control. 1214.3 Flow-Sensing Devices. 1214.4 Automatic Makeup Fluid. 1214.5 Differential Pressure Regulation. 1214.5.1 Differential Pressure Bypass Valve. 1214.6 Air-Removal Device. 1214.7 Air-Separation Device. 1214.8 Secondary Loops. 1215.0 Hydronic Space Heating. 1215.1 General. 1215.2 Installation. 1215.3 Freeze Protection.
286	1215.4 Balancing. 1215.5 Heat Transfer Fluid. 1216.0 Steam Systems. 1216.1 Steam Traps. 1216.2 Sloping for Two-Pipe System. 1216.3 Sloping for One-Pipe System. 1216.4 Automatic Air Vents. 1216.5 Condensate Flow. 1216.6 Steam-Distribution Piping. 1217.0 Radiant Heating and Cooling. 1217.1 Installation. 1217.1.1 Manifolds. 1217.2 Radiant Under-Floor Heating. 1217.3 Radiant Cooling Systems. 1217.4 Tube Placement. 1217.5 Poured Floor Structural Co ncrete Sl ab Systems (Thermal Mass). 1217.5.1 Slab Penetration Tube and Joint Protection. TABLE 1217.4 MAXIMUM LENGTH OF CONTINUOUS TUBING FROM A SUPPLY-AND-RETURN MANIFOLD ARRANGEMENT
287	1217.5.2 Insulation. 1217.5.3 Types of Tube Fasteners. 1217.5.4 Spacing of Tube Fasteners. 1217.6 Joist Systems and Subfloors. 1217.6.1 Tubing Fasteners. 1217.7 Wall and Ceiling Panels. 1217.8 Radiant Heating and Cooling Panels. 1217.8.1 Electric Heating Panel Systems. 1217.8.2 Radiant Wall and Ceiling Panels. 1218.0 Heat Exchangers. 1218.1 General.
288	1219.0 Indirect-Fired Domestic Hot-Water Storage Tanks. 1219.1 General. 1220.0 Snow and Ice Melt Systems. 1220.1 Use of Chemical Additives and Corrosive Fluids. 1220.2 Types of Tube Fasteners. 1220.3 Spacing of Tube Fasteners. 1220.4 Snow and Ice Melt Controls. 1220.4.1 Tube Placement. 1220.4.2 Poured Structural Concrete Slab Systems. TABLE 1220.4.1 LOOP LENGTHS FOR SNOW AND ICE MELT SYSTEMS
289	1220.4.3 Slab Penetration Tube and Joint Protection. 1220.4.4 Concrete Slab Preparation. 1220.4.5 Insulation. 1220.4.6 Testing and Flushing. 1220.5 Hydronic Makeup Air Units. 1221.0 Piping Installation. 1221.1 General. 1221.2 Embedded Piping Materials and Joints. 1221.2.1 Steel Pipe. 1221.2.2 Copper Tubing. 1221.2.3 Plastics. 1221.3 Pressure Testing. 1221.4 System Drainage. 1221.5 Condensate Drainage. 1221.6 Clearance to Combustibles.
290	CHAPTER 13 FUEL GAS PIPING 1301.0 Scope of Gas Piping. 1301.1 Applicability. 1302.0 Coverage of Piping System. TABLES FIGURES FIGURE 1301.1 PROPERTIES OF FUEL GAS
291	1302.1 General. 1302.2 Piping System Requirements. 1302.3 Applications. FIGURE 1302.0 FUEL GAS PIPING SYSTEM
292	1303.0 Inspection. 1303.1 Inspection Notification. 1303.2 Excavation. 1303.3 Type of Inspections. 1303.3.1 Rough Piping Inspection. 1303.3.2 Final Piping Inspection. 1303.3.3 Test Gauges. 1303.3.3.1 Pressure Tests (10 psi or less). 1303.3.3.2 Pressure Tests (greater than 10 psi to 100psi). 1303.3.3.3 Pressure Tests (exceeding 100 psi).
293	1303.3.3.4 Pressure Range. 1303.4 Inspection Waived. 1304.0 Certificate of Inspection. 1304.1 Issuance. 1304.2 Gas Supplier. 1304.3 Unlawful. 1305.0 Authority to Render Gas Service. 1305.1 Authorized Personnel. 1305.2 Outlets. 1306.0 Authority to Disconnect. 1306.1 Disconnection. 1306.2 Notice. 1306.3 Capped Outlets. 1307.0 Temporary Use of Gas. 1307.1 General.
294	1308.0 Gas Piping System Design, Materials, and Components. 1308.1 Installation of Piping System. 1308.1.1 Addition to Existing System. 1308.2 Provision for Location of Point of Delivery. 1308.3 Interconnections Between Gas Piping Systems. 1308.3.1 Interconnections for Standby Fuels. 1308.4 Sizing of Gas Piping Systems.
295	1308.4.1 Maximum Gas Demand. 1308.4.2 Sizing Methods. 1308.4.3 Allowable Pressure Drop. TABLE 1308.4.1 APPROXIMATE GAS INPUT FOR TYPICAL APPLIANCES
296	1308.5 Acceptable Piping Materials and Joining Methods. 1308.5.1 Used Materials. 1308.5.1.1 Other Materials. 1308.5.2 Metallic Pipe. 1308.5.2.1 Steel, Stainless Steel, and Wrought-Iron. 1308.5.2.2 Copper and Copper Alloy Pipe. 1308.5.2.3 Aluminum Alloy Pipe. FIGURE 1308.5.2.2 SULFIDATION OF COPPER PIPE
297	1308.5.3 Metallic Tubing. 1308.5.3.1 Stainless Steel Tubing. 1308.5.3.2 Steel Tubing. 1308.5.3.3 Copper and Copper Alloy Tubing. 1308.5.3.4 Aluminum Alloy Tubing. 1308.5.3.5 Corrugated Stainless Steel Tubing. 1308.5.4 Plastic Pipe, Tubing, and Fittings. 1308.5.4.1 Regulator Vent Piping. 1308.5.4.2 Anodeless Risers. FIGURE 1308.5.3.4 PLASTIC PIPE AND FITTINGS
298	1308.5.4.2.1 Factory-Assembled Anodeless Risers. 1308.5.4.2.2 Service Head Adapters and Field-Assembled Anodeless Risers. 1308.5.4.2.3 Undiluted Liquefied Petroleum Gas Piping. 1308.5.5 Workmanship and Defects. 1308.5.6 Metallic Pipe Threads. 1308.5.6.1 Damaged Threads. 1308.5.6.2 Number of Threads. TABLE 1308.5.6.2 SPECIFICATIONS FOR THREADING METALLIC PIPE FIGURE 1308.5.4.2 RISERS FIGURE 1308.5.4.2.2 ANODELESS RISER
299	1308.5.6.3 Thread Joint Compounds. 1308.5.7 Metallic Piping Joints and Fittings. 1308.5.7.1 Pipe Joints. 1308.5.7.2 Copper Tubing Joints. 1308.5.7.3 Stainless Steel Tubing Joints. 1308.5.7.4 Flared Joints. 1308.5.7.5 Metallic Pipe Fittings.
300	1308.5.8 Plastic Piping, Joints, and Fittings. 1308.5.8.1 Joint Design. 1308.5.8.2 Heat Fusion Joint. 1308.5.8.3 Compression-Type Mechanical Joints. 1308.5.8.4 Liquefied Petroleum Gas Piping Systems. 1308.5.9 Flange Specifications. 1308.5.9.1 Steel Flanges. 1308.5.9.2 Non-Ferrous Flanges. 1308.5.9.3 Ductile Iron Flanges. 1308.5.9.4 Dissimilar Flange Connections. 1308.5.9.5 Flange Facings. 1308.5.9.6 Lapped Flanges. 1308.5.10 Flange Gaskets. 1308.5.10.1 Flange Gasket Materials. 1308.5.10.2 Metallic Flange Gaskets. 1308.5.10.3 Non-Metallic Flange Gaskets. 1308.5.10.4 Full-Face Flange Gasket. 1308.5.10.5 Separated Flanges. 1308.6 Gas Meters. 1308.6.1 Location. 1308.6.1.1 Subject to Damage. 1308.6.1.2 Extreme Temperatures. 1308.6.2 Supports.
301	1308.6.3 Meter Protection. 1308.6.4 Identification. 1308.7 Gas Pressure Regulators. 1308.7.1 Listing. 1308.7.2 Location. 1308.7.3 Regulator Protection. 1308.7.4 Venting of Line Pressure Regulators. 1308.7.5 Venting of Gas Appliance Pressure Regulators. 1308.7.6 Bypass Piping. 1308.7.7 Identification. FIGURE 1308.6.1.1 GAS METER PROTECTION FIGURE 1308.6.4 GAS METER INSTALLATION AND METER TAG
302	1308.8 Overpressure Protection. 1308.9 Pressure Limitation Requirements. 1308.9.1 Overpressure Protection Required. FIGURE 1308.8A GAS LINE REGULATOR WITH VENT-LIMITING MEANS FIGURE 1308.8B LINE PRESSURE REGULATOR
303	1308.9.2 Overpressure Protection Devices. 1308.9.3 Detection of Failure. 1308.9.4 Flow Capacity. 1308.10 Overpressure Protection Devices. 1308.10.1 Separate Devices. 1308.10.2 Construction and Installation. 1308.10.3 External Control Piping. 1308.10.4 Setting. 1308.10.5 Unauthorized Operation. 1308.10.6 Discharge of Vents. 1308.10.7 Size of Fittings, Pipe, and Openings. 1308.11 Backpressure Protection. 1308.11.1 Protective Devices.
304	1308.12 Low-Pressure Protection. 1308.13 Shutoff Valves. 1308.14 Expansion and Flexibility. 1308.14.1 Special Local Conditions. 1309.0 Excess Flow Valve. 1309.1 General. 1310.0 Gas Piping Installation. 1310.1 Piping Underground. 1310.1.1 Cover Requirements. FIGURE 1309.1 EXCESS FLOW VALVE
305	1310.1.2 Trenches. 1310.1.2.1 Backfilling. 1310.1.3 Protection Against Corrosion. 1310.1.3.1 Zinc Coating. 1310.1.3.2 Underground Piping. FIGURE 1310.1.1 TERRA TAPE
306	1310.1.3.3 Cathodic Protection. 1310.1.3.4 Sacrificial Anodes. 1310.1.3.5 System Failing Tests. 1310.1.3.6 Impressed Current Cathodic Protection. FIGURE 1310.1.3.3A GALVANIC CATHODIC PROTECTION FIGURE 1310.1.3.3B IMPRESSED CURRENT CATHODIC PROTECTION
307	1310.1.3.7 Documentation. 1310.1.3.8 Dissimilar Metals. 1310.1.3.9 Steel Risers. 1310.1.4 Protection Against Freezing. 1310.1.5 Piping Through Foundation Wall. 1310.1.6 Piping Underground Beneath Buildings. 1310.1.6.1 Conduit with One End Terminating Outdoors. 1310.1.6.2 Conduit with Both Ends Terminating Indoors. FIGURE 1310.1.5 PIPING THROUGH A FOUNDATION WALL FIGURE 1310.1.6 APPROVED PIPING MAY BE INSTALLED IN OTHER LOCATIONS WITH PERMISSION FROM THE AUTHORITY HAVING JURISDICTION
308	1310.1.7 Plastic Piping. 1310.1.7.1 Connections Between Metallic and Plastic Piping. 1310.1.7.2 Tracer Wire. 1310.2 CSST Piping Systems. 1310.3 Installation of Aboveground Piping. FIGURE 1310.1.7A TRANSITION FITTING FIGURE 1310.1.7B ANODE-TYPE RISER INSTALLATION FIGURE 1310.1.7C WALL HEAD ADAPTER
309	1310.3.1 Protective Coating. 1310.3.2 Building Structure. 1310.3.3 Gas Piping to be Sloped. 1310.3.3.1 Ceiling Locations. 1310.3.4 Prohibited Locations. 1310.3.5 Hangers, Supports, and Anchors. 1310.3.5.1 Spacing. 1310.3.5.2 Expansion and Contraction. TABLE 1310.3.5.1 SUPPORT OF PIPING
310	1310.3.5.3 Piping on Roof Tops. 1310.3.6 Removal of Piping. 1310.4 Concealed Piping in Buildings. 1310.4.1 Connections. 1310.4.2 Piping in Partitions. 1310.4.3 Tubing in Partitions. 1310.4.4 Piping in Floors. FIGURE 1310.4.3 TUBING INSTALLATION WITHIN PARTITIONS
311	1310.5 Piping in Vertical Chases. 1310.5.1 Pressure Reduction. 1310.5.2 Chase Construction. 1310.5.3 Ventilation. 1310.6 Maximum Operating Pressure in Buildings. 1310.6.1 LP-Gas Systems. 1310.7 Appliance Overpressure Protection. 1310.8 Gas Pipe Turns. 1310.8.1 Metallic Pipe.
312	1310.8.2 Plastic Pipe. 1310.8.3 Elbows. 1310.9 Drips and Sediment Traps. 1310.9.1 Location of Drips. 1310.9.2 Sediment Traps. 1310.10 Outlets. FIGURE 1310.8.3 ARC LENGTH OF CUT FITTING FIGURE 1310.9 DRIP TRAP
313	1310.10.1 Cap Outlets. 1310.10.1.1 Appliance Shutoff Valves. 1310.11 Manual Gas Shutoff Valves. 1310.11.1 Valves Controlling Multiple Systems. 1310.11.1.1 Shutoff Valves for Multiple House Lines. FIGURE 1310.10.1 MULTIPLE OUTLETS CAPPED AND READY FOR TEST
314	1310.11.2 Emergency Shutoff Valves. 1310.11.3 Shutoff Valve for Laboratories. 1310.12 Prohibited Devices. 1310.13 Systems Containing Gas-Air Mixtures Outside the Flammable Range. 1310.14 Systems Containing Flammable Gas-Air Mixtures. 1310.14.1 Required Components. 1310.14.2 Optional Components. 1310.14.3 Additional Requirements. 1310.14.4 Special Requirements for Mixing Blowers. 1310.14.5 Installation of Gas-Mixing Machines. FIGURE 1310.11.1.1 MANUAL GAS SHUTOFF VALVE
315	1310.14.6 Use of Automatic Firechecks, Safety Blowouts, or Backfire Preventers. 1311.0 Electrical Bonding and Grounding. 1311.1 Pipe and Tubing Other than CSST. 1311.2 Bonding of CSST Gas Piping.
316	1311.2.1 Bonding Jumper Connection. 1311.2.2 Bonding Jumper Size. 1311.2.3 Bonding Jumper Length. 1311.2.4 Bonding Connections. 1311.2.5 Devices Used for Bonding. 1311.3 Arc-Resistant Jacketed CSST. 1311.4 Prohibited Use. 1311.5 Lightning Protection System. 1311.6 Electrical Circuits. FIGURE 1311.2A ELECTRICAL BONDING OF CSST SYSTEM FIGURE 1311.2B BONDING CONNECTION AT METER FIGURE 1311.2C BONDING CLAMP AND CONDUCTOR
317	1311.7 Electrical Connections. 1311.7.1 Safety Control. 1312.0 Appliance and Equipment Connections to Building Piping. 1312.1 Connecting Appliances and Equipment. 1312.1.1 Commercial Cooking Appliances. 1312.1.2 Restraining Device. 1312.2 Suspended Low-Intensity Infrared Tube Heaters. FIGURE 1312.1A RIGID CONNECTION TO APPLIANCE FIGURE 1312.1B FLEXIBLE APPLIANCE CONNECTION FIGURE 1312.1.1 KITCHEN EQUIPMENT ON CASTERS WITH QUICK DISCONNECT AND SWIVEL
318	1312.3 Use of Nonmetalic Gas Hose Connectors. 1312.3.1 Indoor. 1312.3.2 Outdoor. 1312.4 Injection (Bunsen) Burners. 1312.5 Connection of Portable and Mobile Industrial Appliances. 1312.5.1 Swivel Joints or Couplings. 1312.5.2 Metal Flexible Connectors. 1312.5.3 Flexible Connectors. 1312.6 Appliance Shutoff Valves and Connections. FIGURE 1312.3 CONNECTION TO OUTDOOR EQUIPMENT
319	1312.7 Quick-Disconnect Devices. 1312.8 Gas Convenience Outlets. 1312.9 Sediment Trap. 1312.10 Installation of Piping. 1312.11 Liquefied Petroleum Gas Facilities and Piping. 1313.0 Pressure Testing, Inspection, and Purging. 1313.1 Piping Installations. 1313.1.1 Inspection Requirements. 1313.1.2 Repairs and Additions. 1313.1.3 New Branches. 1313.1.4 Piping System. 1313.1.5 Regulators and Valves. 1313.1.6 Test Medium. FIGURE 1312.9 METHOD OF INSTALLING A TEE FITTING SEDIMENT TRAP
320	1313.2 Test Preparation. 1313.2.1 Pipe Joints. 1313.2.2 Expansion Joints. 1313.2.3 Appliances and Equipment. 1313.2.4 Designed for Operating Pressures Less than Test Pressure. 1313.2.5 Designed for Operating Pressures Equal to or Greater than Test Pressure. 1313.2.6 Safety. 1313.3 Test Pressure. 1313.4 Detection of Leaks and Defects. 1313.4.1 Detecting Leaks. 1313.4.2 Repair or Replace. 1313.5 Piping System Leak Test. 1313.5.1 Turning Gas On. FIGURE 1313.4.1 GAS LEAK DETECTION – LIQUID AND ELECTRONIC
321	1313.5.2 Leak Check. 1313.5.3 Placing Appliances and Equipment in Operation. 1313.6 Purging Requirements. 1313.6.1 Piping Systems Required to be Purged Outdoors. 1313.6.1.1 Removal from Service. 1313.6.1.2 Placing in Operation. 1313.6.1.3 Outdoor Discharge of Purged Gases. 1313.6.1.4 Combustible Gas Indicator. 1313.6.2 Piping Systems Allowed to be Purged Indoors or Outdoors. TABLE 1313.6.1 SIZE AND LENGTH OF PIPING
322	1313.6.2.1 Purging Procedure. 1313.6.2.2 Combustible Gas Detector. 1313.6.3 Purging Appliances and Equipment. 1314.0 Required Gas Supply. 1314.1 General. 1314.2 Volume. 1314.3 Gas Appliances. 1314.4 Size of Piping Outlets. 1315.0 Required Gas Piping Size. 1315.1 Pipe Sizing Methods. 1315.1.1 Longest Length Method.
323	1315.1.2 Branch Length Method. 1315.1.3 Hybrid Pressure. 1315.2 Sizing of Gas Piping Systems. 1315.2.1 Natural Gas Piping Systems. 1315.2.2 Propane Piping Systems. 1315.3 Sizing Equations.
324	FIGURE 1315.1.3 HYBRID PRESSURE GAS SYSTEM
325	1315.4 Sizing of Piping Sections. 1315.5 Engineering Methods. 1315.6 Variable Gas Pressures. TABLE 1315.3 Cr AND Y FOR NATURAL GAS AND UNDILUTED PROPANE AT STANDARD CONDITIONS
327	FIGURE 1315.1.1 EXAMPLE ILLUSTRATING USE OF TABLE 1308.4.1 AND TABLE 1315.2(1)
328	TABLE 1315.2(1)SCHEDULE 40 METALLIC PIPE
329	TABLE 1315.2(2) SCHEDULE 40 METALLIC PIPE
330	TABLE 1315.2(3) SCHEDULE 40 METALLIC PIPE
331	TABLE 1315.2(4) SCHEDULE 40 METALLIC PIPE
332	TABLE 1315.2(5) SCHEDULE 40 METALLIC PIPE
333	TABLE 1315.2(6) SCHEDULE 40 METALLIC PIPE
334	TABLE 1315.2(7) SEMI-RIGID COPPER TUBING
335	TABLE 1315.2(8) SEMI-RIGID COPPER TUBING
336	TABLE 1315.2(9) SEMI-RIGID COPPER TUBING
337	TABLE 1315.2(10) SEMI-RIGID COPPER TUBING
338	TABLE 1315.2(11) SEMI-RIGID COPPER TUBING
339	TABLE 1315.2(12) SEMI-RIGID COPPER TUBING
340	TABLE 1315.2(13) SEMI-RIGID COPPER TUBING
341	TABLE 1315.2(14) CORRUGATED STAINLESS STEEL TUBING (CSST)
342	TABLE 1315.2(15) CORRUGATED STAINLESS STEEL TUBING (CSST)
343	TABLE 1315.2(16) CORRUGATED STAINLESS STEEL TUBING (CSST)
344	TABLE 1315.2(17) CORRUGATED STAINLESS STEEL TUBING (CSST)
345	TABLE 1315.2(18) CORRUGATED STAINLESS STEEL TUBING (CSST)
346	TABLE 1315.2(19) POLYETHYLENE PLASTIC PIPE
347	TABLE 1315.2(20) POLYETHYLENE PLASTIC PIPE
348	TABLE 1315.2(21) POLYETHYLENE PLASTIC PIPE
349	TABLE 1315.2(22) POLYETHYLENE PLASTIC TUBING TABLE 1315.2(23) POLYETHYLENE PLASTIC TUBING
350	TABLE 1315.2(24) SCHEDULE 40 METALLIC PIPE
351	TABLE 1315.2(25) SCHEDULE 40 METALLIC PIPE
352	TABLE 1315.2(26) SCHEDULE 40 METALLIC PIPE
353	TABLE 1315.2(27) SCHEDULE 40 METALLIC PIPE
354	TABLE 1315.2(28) SEMI-RIGID COPPER TUBING
355	TABLE 1315.2(29) SEMI-RIGID COPPER TUBING
356	TABLE 1315.2(30) SEMI-RIGID COPPER TUBING
357	TABLE 1315.2(31) CORRUGATED STAINLESS STEEL TUBING (CSST)
358	TABLE 1315.2(32) CORRUGATED STAINLESS STEEL TUBING (CSST)
359	TABLE 1315.2(33) CORRUGATED STAINLESS STEEL TUBING (CSST)
360	TABLE 1315.2(34) POLYETHYLENE PLASTIC PIPE
361	TABLE 1315.2(35) POLYETHYLENE PLASTIC PIPE
362	TABLE 1315.2(36) POLYETHYLENE PLASTIC TUBING
364	CHAPTER 14 PROCESS PIPING 1401.0 General. 1401.1 Applicability. 1402.0 Permit. 1402.1 General. 1403.0 Plans Required. 1403.1 General. 1404.0 Workmanship. 1404.1 General. 1405.0 Inspections. 1405.1 General. 1405.2 Required Inspections. 1405.2.1 Rough Piping Inspection. 1405.2.2 Final Piping Inspection. FIGURES FIGURE 1404.1 SUPPORTS
365	1405.3 Other Inspections. 1406.0 Pipe, Tubing, and Fittings. 1406.1 General. 1406.2 Hazardous Process Piping (HPP). 1406.2.1 Installation in Exit Corridors and Above Other Occupancies. 1406.2.1.1 Automatic Sprinklers. 1406.2.1.2 Ventilation. 1406.2.1.3 Receptor. 1406.2.1.4 Separation. 1406.2.1.5 Emergency Shutoff Valves.
366	1406.2.1.6 Electrical Wiring. 1406.3 Special Requirements for HPP Gases. 1406.3.1 Special Provisions. 1406.3.2 Piping and Tubing Installation. FIGURE 1406.2.1.5 INSTALLATION IN EXIT CORRIDORS
367	1406.3.3 Gas-Detection System. FIGURE 1406.3.2 PIPING AND TUBING INSTALLATION
368	CHAPTER 15 SOLAR ENERGY SYSTEMS 1501.0 General. 1501.1 Applicability.
370	CHAPTER 16 STATIONARY POWER PLANTS 1601.0 Stationary Fuel Cell Power Plants. 1601.1 General. 1602.0 Stationary Gas Engines and Generators. 1602.1 General. 1602.2 Connection to the Gas Supply Piping. 1602.3 Stationary Engine Generators. FIGURES FIGURE 1602.0 RECIPROCATING PISTON STATIONARY ENGINE GENERATOR
372	CHAPTER 17 REFERENCED STANDARDS 1701.0 General. TABLES FIGURES
375	1701.1 Standards. FIGURE 1701.1A IAPMO MARKS FIGURE 1701.1B IAPMO R&T TESTING
376	TABLE 1701.1 REFERENCED STANDARDS
389	1701.2 Standards, Publications, Practices, and Guides. TABLE 1701.2 STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
394	ABBREVIATIONS IN TABLE 1701.1 AND TABLE 1701.2
396	APPENDICES TABLE OF CONTENTS
398	APPENDIX A RESIDENTIAL PLANS EXAMINER REVIEW FORM FOR HVAC SYSTEM DESIGN (Loads, Equipment, Ducts) [ACCA] Residential Plans Examiner Review Form for HVAC System Design (Loads, Equipment, Ducts)
400	APPENDIX B PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT IN OPERATION B 101.0 Adjusting the Burner Input. B 101.1 Adjusting Input. B 101.2 High Altitude. B 102.0 Primary Air Adjustment. B 102.1 General. B 103.0 Safety Shutoff Devices. B 103.1 General. B 104.0 Automatic Ignition. B 104.1 General. B 105.0 Protective Devices. B 105.1 General. B 106.0 Checking the Draft. B 106.1 General. B 107.0 Operating Instructions. B 107.1 General.
402	APPENDIX C INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIRED EQUIPMENT C 101.0 General. C 101.1 Applicability. C 102.0 Definitions.
403	C 103.0 Standards and Accepted Practices. C 103.1 General. C 104.0 Approval of Equipment. C 104.1 General. C 105.0 Placing Equipment in Operation. C 105.1 General. C 106.0 Pilot Operation. C 106.1 General. C 107.0 Burner Operation. C 107.1 General. C 108.0 Method of Test. C 108.1 General Test Methods.
404	C 109.0 Special Requirements Based on Btu/h Input. C 109.1 General.
408	APPENDIX D FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL VEHICLE PARKS D 101.0 Fuel Gas Piping Systems. D 101.1 General. D 101.2 Gas Supply Connections. D 101.3 Location of Gas Supply Connection. D 101.4 Recreational Vehicle Park Fuel-Gas Equipment and Installations. D 102.0 Single and Multiple Manufactured Home Site Fuel Supply Systems. D 102.1 Underground Installation. D 102.1.1 Open-Ended Gastight Conduit. D 102.1.2 Requirements. D 103.0 Manufactured Home Site Gas Shutoff Valve. D 103.1 General. D 104.0 Gas Meters. D 104.1 Support of Meters. D 104.2 Location of Meters. D 104.3 Meter Shutoff Valve or Cock. D 105.0 Cathodic Protection Requirements. D 105.1 General. TABLE
409	D 106.0 Manufactured Home Community LP-Gas Supply Systems. D 106.1 General. D 107.0 Required Gas Supply. D 107.1 General. D 108.0 Gas Pipe Sizing and Pressure. D 108.1 Size. D 108.2 Pressure. D 109.0 Gas Piping Materials. D 109.1 Metal. D 109.2 Protection Coatings for Metal Gas Piping. D 109.3 Plastic. D 110.0 Gas Piping Installations. D 110.1 Minimum Burial Below Ground Level and Clearances. D 110.2 Metallic Gas Piping. D 110.2.1 Cathodic Protection. TABLE D 107.1 DEMAND FACTORS FOR USE IN CALCULATING GAS PIPING SYSTEMS IN MANUFACTURED HOME COMMUNITIES
410	D 110.2.2 Underground Metallic Systems. D 110.3 Plastic Gas Piping. D 110.4 Gas Piping System Shutoff Valve. D 111.0 Liquefied Petroleum Gas Appliances. D 111.1 General. D 112.0 Oil Supply. D 112.1 General. D 112.2 Minimum Oil Supply Tank Size. D 112.3 Oil Supply Connections. D 113.0 Fuel Supply Systems Installation. D 113.1 Flexible Gas Connector.
411	D 113.2 Use of Approved Pipe and Fittings of Extension. D 113.3 Mechanical Protection. D 113.4 Special Rules on Atmospherically Controlled Regulators. D 113.5 Fuel Gas Piping Test. D 113.5.1 Procedures. D 113.5.2 Warning. D 113.5.3 Vents. D 113.6 Oil Tanks. D 113.6.1 Installation. D 113.6.2 Capacity. D 113.6.3 Location. D 113.6.4 Vent. D 113.6.5 Liquid Level. D 113.6.6 Fill Opening. D 114.0 Manufactured Home Accessory Building Fuel Supply Systems. D 114.1 General. D 115.0 Community Building Fuel Supply Systems in Manufactured Home Communities. D 115.1 Fuel Gas Piping and Equipment Installations.
412	D 115.2 Oil Supply Systems in Manufactured Home Communities. D 115.3 Oil-Burning Equipment and Installation. D 115.4 Inspection and Tests.
414	APPENDIX E SUSTAINABLE PRACTICES E 101.0 General. E 101.1 Applicability. E 101.2 Definition of Terms. E 201.0 Definitions. E 201.1 Cycles of Concentration for Cooling Towers. E 201.2 Duct Wall Penetrations. E 201.3 Energy Star. E 201.4 Geothermal. E 201.5 Heating Seasonal Performance Factor (HSPF). E 201.6 Integrated Energy Efficiency Ratio (IEER). E 201.7 Integrated Part-Load Value (IPLV). E 201.8 Joint, Transverse. E 201.9 Maintenance. E 201.10 Minimum Efficiency Reporting Value (MERV). E 201.11 Multi-Occupant Spaces. E 201.12 Recirculation System. E 201.13 Seam, Longitudinal. E 201.14 Seasonal Energy Efficiency Ratio (SEER). E 301.0 General Regulations. E 301.1 Installation. E 301.2 Qualifications. E 302.0 Disposal of Liquid Waste. E 302.1 Disposal. E 302.2 Connections to Plumbing System Required. E 303.0 Abandonment. E 303.1 General. E 401.0 Water Conservation and Efficiency. E 401.1 General. TABLES FIGURE FORMS
415	E 402.0 Meters. E 402.1 Required. E 402.2 Consumption Data. E 402.3 Access. E 403.0 HVAC Water Use. E 403.1 Once-Through Cooling. E 403.2 Cooling Towers and Evaporative Coolers. E 403.3 Cooling Tower Makeup Water. E 403.4 Evaporative Cooler Water Use. E 403.4.1 Overflow Alarm. E 403.4.2 Automatic Pump Shut-Off. E 403.4.3 Cooler Reservoir Discharge. E 403.4.4 Discharge Water Reuse. E 403.4.5 Discharge Water to Drain. E 403.5 Use of Reclaimed (Recycled) and Onsite Treated Nonpotable Water for Cooling. E 403.5.1 Drift Eliminator. E 403.5.2 Disinfection. E 501.0 Heating, Ventilation, and Air-Conditioning Systems and Equipment – Energy Efficiency. E 501.1 Scope. E 502.0 Heating, Ventilation, and Air-Conditioning Low-Rise Residential Buildings.
416	E 502.1 General. E 502.2 Heating, Ventilating, and Air-Conditioning Systems and Equipment. E 502.2.1 Nonresidential Type Systems and Equipment. E 502.3 Balancing. E 502.3.1 Balancing Dampers. E 502.4 Ducts. E 502.4.1 Insulation for Ducts. E 502.4.2 Ducts and Register Penetrations. E 502.4.3 Duct Leakage Test. E 502.4.3.1 Duct Leakage Verification Test. E 502.4.4 Duct Sizing. E 502.5 Insulation for Piping. E 502.6 Ventilation and Combustion Air. E 502.6.1 Combustion Air. E 502.7 Electric Heating Systems. E 502.7.1 Wall, Floor, or Ceiling Electric-Resistance Heating. E 502.7.2 Electric Central Warm Air Heating.
417	E 502.8 Bath Ceiling Units. E 502.9 HVAC Equipment, Rated Combinations. E 502.10 Controls. TABLE E 502.5 MINIMUM PIPE INSULATION THICKNESS TABLE E 502.6 VENTILATION AIR
418	E 502.10.1 Initial Control Setting. E 502.10.2 Ventilation Control. E 502.10.3 Humidity Control. E 502.10.3.1 Cooling. E 502.10.4 Freeze Protection Systems. E 502.10.5 Other Controls. E 502.11 Whole House Fans. E 502.12 Dampers. E 503.0 Heating, Ventilation, and Air-Conditioning – Other than Low-Rise Residential Buildings. E 503.1 General. E 503.1.1 New Buildings. E 503.1.2 Additions to Existing Buildings. E 503.1.3 Alterations to Heating, Ventilating, Air-Conditioning, and Refrigeration in Existing Buildings. TABLE E 502.9 MINIMUM REQUIREMENTS FOR NON-FEDERALLY COVERED HVAC EQUIPMENT
419	E 503.1.3.1 New Cooling Systems. E 503.1.3.2 Existing Cooling Systems. E 503.1.3.3 Ductwork. E 503.1.3.4 Piping. E 503.2 Compliance Path(s). E 503.2.1 Projects Using Energy Cost Budget Method. E 503.3 Simplified Approach Option for HVAC Systems. E 503.3.1 Criteria.
420	E 503.3.2 Climate Zone Determination. E 503.4 Mandatory Provisions.
421	E 503.4.1 Water-Cooled Centrifugal Chilling Packages. Figure E 503.3.2 ASHRAE CLIMATE ZONE MAP
422	E 503.4.1.1 Positive Displacement (air- and water-cooled) Chilling Packages. E 503.4.2 Equipment not Listed. E 503.4.3 Verification of Equipment Efficiencies. E 503.4.4 Labeling. E 503.4.4.1 Packaged Terminal Air Conditioners. E 503.4.5 Load Calculations.
423	E 503.4.5.1 Pump Head. E 503.4.6 Zone Thermostatic Controls. E 503.4.6.1 Dead Band. E 503.4.6.2 Setpoint Overlap Restriction. E 503.4.6.3 Off-Hour Controls. E 503.4.6.3.1 Automatic Shutdown. E 503.4.6.3.2 Setback Controls. E 503.4.6.3.3 Optimum Start Controls. E 503.4.6.3.4 Zone Isolation.
424	E 503.4.6.3.5 Automatic Control of HVAC in Hotel/Motel Guest Rooms. E 503.4.6.3.5.1 Guest Room HVAC Set-Point Control. E 503.4.6.4 Ventilation System Controls. E 503.4.6.4.1 Shutoff Damper Controls. E 503.4.6.4.2 Dampers Leakage. E 503.4.6.4.3 Ventilation Fan Controls. E 503.4.6.5 Enclosed Parking Garage Ventilation. E 503.4.6.6 Heat Pump Auxiliary Heat Control.
425	E 503.4.6.7 Humidification and Dehumidification. E 503.4.6.8 Freeze Protection and Snow or Ice Melting Systems. E 503.4.6.9 Ventilation Controls for High-Occupancy Areas. E 503.4.6.10 Outdoor Heating. TABLE E 503.4.6.4.2 MAXIMUM DAMPER LEAKAGE (cubic foot per minute per square foot) at 1.0 in. w.g)
426	E 503.4.6.11 Heated or Cooled Vestibules. E 503.4.6.12 Direct Digital Control (DDC) Requirements. E 503.4.6.12.1 DDC Applications. E 503.4.6.12.2 DDC Controls. E 503.4.6.12.3 DDC Display. E 503.4.6.13 Economizer Fault Detection Diagnostics (FDD). TABLE E 503.4.6.12.1 DDC APPLICATIONS AND QUALIFICATIONS
427	E 503.4.7 HVAC System Construction and Insulation. E 503.4.7.1 Insulation. E 503.4.7.1.1 Duct and Plenum Insulation. E 503.4.7.1.2 Piping Insulation. E 503.4.7.1.3 Sensible Heating Panel. E 503.4.7.1.4 Radiant Floor Heating. E 503.4.7.2 Ductwork and Plenum Leakage.
428	E 503.4.7.2.1 Duct Leakage Tests. E 503.5 Prescriptive Path, Economizers. TABLE E 503.5(1) MINIMUM FAN-COOLING UNIT SIZE WHERE AN ECONOMIZER IS REQUIRED TABLE E 503.5(2) ELIMINATE REQUIRED ECONOMIZER FOR COMFORT COOLING BY INCREASING COOLING EFFICIENCY
429	E 503.5.1 Air Economizers, Design Capacity. E 503.5.1.1 Control Signal. E 503.5.1.2 High-Limit Shutoff. E 503.5.1.3 Dampers. E 503.5.1.4 Relief of Excess Outdoor Air. E 503.5.1.5 Sensor Accuracy. E 503.5.2 Fluid Economizers, Design Capacity. TABLE E 503.5.1.2 HIGH-LIMIT SHUTOFF CONTROL SETTINGS FOR AIR ECONOMIZERS
430	E 503.5.2.1 Maximum Hydronic Pressure Drop. E 503.5.3 Integrated Economizer Control. E 503.5.4 Economizer Heating System Impact. TABLE E 503.5.2 WATER ECONOMIZER SIZING DRY-BULB AND WET-BULB REQUIREMENTS FOR COMPUTER ROOMS
431	E 503.5.4.1 Economizer Humidification System Impact. E 503.5.5 Simultaneous Heating and Cooling Limitation, Zone Controls. E 503.5.5.1 Supply Air Temperature Reheat Limit. E 503.5.5.2 Hydronic System Controls. E 503.5.5.2.1 Three-Pipe System. E 503.5.5.2.2 Two-Pipe Changeover System. TABLE E 503.5.3 DX COOLING STAGE REQUIREMENTS FOR MODULATING AIRFLOW UNITS
432	E 503.5.5.2.3 Hydronic (Water Loop) Heat Pump Systems. E 503.5.5.3 Dehumidification. E 503.5.5.4 Humidifier Preheat. E 503.5.5.4.1 Insulation. E 503.5.5.5 Preheat Coils. E 503.5.6 Air System Design and Control. E 503.5.6.1 Fan System Power and Efficiency.
433	E 503.5.6.1.1 Motor Nameplate Horsepower. E 503.5.6.1.2 Fan Efficiency. TABLE E 503.5.6.1(1) FAN POWER LIMITATION TABLE E 503.5.6.1(2) FAN POWER LIMITATION PRESSURE DROP ADJUSTMENT
434	E 503.5.6.2 Supply Fan Airflow Control. E 503.5.6.2.1 VAV Static Pressure Sensor Location. E 503.5.6.2.2 VAV Setpoint Reset. E 503.5.6.3 Multiple-Zone VAV System Ventilation Optimization Control. E 503.5.6.4 Supply Air Temperature Reset Controls. TABLE E 503.5.6.2 FAN AIRFLOW CONTROL
435	E 503.5.6.5 Fractional Horsepower Fan Motors. E 503.5.6.6 Ventilation Design. E 503.5.7 Hydronic System Design and Control. E 503.5.7.1 Hydronic Variable Flow Systems. TABLE E 503.5.6.5(1) MINIMUM AVERAGE FULL-LOAD EFFICIENCY FOR POLYPHASE SMALL ELECTRIC MOTORS
436	E 503.5.7.2 Chiller and Boiler Isolation. E 503.5.7.2.1 Boiler Isolation. E 503.5.7.3 Chilled- and Hot-Water Temperature Reset Controls. TABLE E 503.5.6.5(2) MINIMUM AVERAGE FULL-LOAD EFFICIENCY FOR CAPACITOR-START CAPACITOR-RUN AND CAPACITOR-START INDUCTION-RUN SMALL ELECTRIC MOTORS TABLE E 503.5.7 BOILER TURNDOWN TABLE E 503.5.7.1 PUMP FLOW CONTROL REQUIREMENTS
437	E 503.5.7.4 Hydronic (Water Loop) Heat Pump and Water-Cooled Unitary Air Conditioners. E 503.5.7.4.1 Controls. E 503.5.7.5 Pipe Sizing. E 503.5.8 Heat Rejection Equipment. E 503.5.8.1 Fan Speed Control. E 503.5.8.2 Variable-Speed Fan Drives. TABLE E 503.5.7.5 PIPING SYSTEM DESIGN MAXIMUM FLOW RATE (gallons per minute)
438	E 503.5.9 Limitation on Centrifugal Fan Open-Circuit Cooling Towers. E 503.5.9.1 Tower Flow Turndown. E 503.5.10 Exhaust Air Energy Recovery. E 503.5.10.1 Heat Recovery for Service Water Heating. E 503.5.10.1.1 Condenser Heat Recovery Systems. E 503.5.10.1.2 Capacity. E 503.5.11 Exhaust Systems. E 503.5.11.1 Transfer Air.
439	E 503.5.11.2 Kitchen Exhaust Systems. E 503.5.11.2.1 Exhaust Flow Rate. E 503.5.11.2.2 Kitchen or Dining Facility. TABLE E 503.5.10(1) EXHAUST AIR ENERGY RECOVERY REQUIREMENTS FOR VENTILATION SYSTEMS OPERATING LESS THAN 8000 HOURS PER YEAR TABLE E 503.5.10(2) EXHAUST AIR ENERGY RECOVERY REQUIREMENTS FOR VENTILATION SYSTEMS OPERATING NOT LESS THAN 8000 HOURS PER YEAR
440	E 503.5.11.2.3 Performance Testing. E 503.5.11.3 Laboratory Exhaust Systems. E 503.5.12 Radiant Heating Systems. E 503.5.12.1 Heating Enclosed Spaces. E 503.5.13 Hot Gas Bypass Limitation. TABLE E 503.5.11.2.1 MAXIMUM NET EXHAUST FLOW RATE, CFM PER LINEAR FOOT OF HOOD LENGTH
441	E 503.5.14 Door Switches. E 503.6 Submittals. E 503.6.1 Construction Details. E 503.6.2 Supplemental Information. E 503.6.3 Manuals. E 503.6.3.1 Required Information. E 503.6.3.2 Lighting Manuals. E 503.6.4 Labeling of Material and Equipment. E 503.6.5 Completion Requirements. E 503.6.5.1 Drawings. E 503.6.5.2 Manuals. TABLE E 503.5.13 HOT GAS BYPASS LIMITATION
442	E 503.6.5.3 System Balancing. E 503.6.5.3.1 Air System Balancing. E 503.6.5.3.2 Hydronic System Balancing. E 503.6.5.4 System Commissioning. E 503.6.5.4.1 Minimum Level of Commission. E 503.7 Minimum Equipment Efficiency Tables. E 503.7.1 Minimum Efficiency Requirement Listed Equipment – Standard Rating and Operating Conditions. E 503.7.2 Duct Insulation Tables. E 503.7.3 Pipe Insulation Tables. E 503.8 Alternative Compliance Path. E 503.8.1 Computer Room (PUE1). E 503.8.2 Computer Room (PUE0). TABLE E 503.8.1 POWER USAGE EFFECTIVENESS (PUE) MAXIMUM
443	E 503.8.3 Documentation. E 504.0 Solar Energy Systems. E 504.1 General. E 601.0 Indoor Environment. E 601.1 Scope. E 602.0 Fireplaces. E 602.1 Requirements. E 602.1.1 Masonry or Factory-Built Fireplace. E 602.1.1.1 Opening Cover. E 602.1.1.2 Combustion Air Intake. E 602.1.1.3 Accessible Damper Control. E 602.1.2 Prohibited. E 603.0 Pollutant Control. E 603.1 Indoor Air Quality During Construction. E 603.1.1 Temporary Ventilation During Construction. E 603.1.2 Indoor Air Quality After Construction. E 603.1.3 Covering of Duct Openings and Protection of Mechanical Equipment During Construction.
444	TABLE E 503.7.1(1) ELECTRICALLY OPERATED UNITARY AIR CONDITIONERS AND CONDENSING UNITS MINIMUM EFFICIENCY REQUIREMENTS
446	TABLE E 503.7.1(2) ELECTRICALLY OPERATED UNITARY AND APPLIED HEAT PUMPS MINIMUM EFFICIENCY REQUIREMENTS
448	TABLE E 503.7.1(3) WATER-CHILLING PACKAGES ─ MINIMUM EFFICIENCY REQUIREMENTS
449	TABLE E 503.7.1(4) ELECTRICALLY OPERATED PACKAGED TERMINAL AIR CONDITIONERS, PACKAGED TERMINAL HEAT PUMPS, SINGLE-PACKAGE VERTICAL AIR CONDITIONERS, SINGLE-PACKAGE VERTICAL HEAT PUMPS, ROOM AIR CONDITIONERS, AND ROOM AIR CONDITIONER HEAT PUMPS ─ MINIMUM EFFICIENCY REQUIREMENTS
450	TABLE E 503.7.1(5) WARM-AIR FURNACES AND COMBINATION WARM-AIR FURNACES/AIR-CONDITIONING UNITS, WARM-AIR DUCT FURNACES, AND UNIT HEATERS ─ MINIMUM EFFICIENCY REQUIREMENTS
451	TABLE E 503.7.1(6) GAS- AND OIL-FIRED BOILERS ─ MINIMUM EFFICIENCY REQUIREMENTS
452	TABLE E 503.7.1(7) PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT MINIMUM EFFICIENCY REQUIREMENTS
453	TABLE E 503.7.1(8) HEAT TRANSFER EQUIPMENT ─ MINIMUM EFFICIENCY REQUIREMENTS TABLE E 503.7.1(9) ELECTRICALLY OPERATED VARIABLE-REFRIGERANT-FLOW AIR CONDITIONERS ─ MINIMUM EFFICIENCY REQUIREMENTS
454	TABLE E 503.7.1(10) ELECTRICALLY OPERATED VARIABLE-REFRIGERANT-FLOW AND APPLIED HEAT PUMPS ─ MINIMUM EFFICIENCY REQUIREMENTS
456	TABLE E 503.7.1(11) AIR CONDITIONERS AND CONDENSING UNITS SERVING COMPUTER ROOMS MINIMUM EFFICIENCY REQUIREMENTS
457	TABLE E 503.7.1(12) COMMERCIAL REFRIGERATOR AND FREEZERS ─ MINIMUM EFFICIENCY REQUIREMENTS
458	TABLE E 503.7.1(13) COMMERCIAL REFRIGERATION ─ MINIMUM EFFICIENCY REQUIREMENTS
459	TABLE E 503.7.1(14) VAPOR COMPRESSION BASED INDOOR POOL DEHUMIDIFIERS – MINIMUM EFFICIENCY REQUIREMENTS TABLE E 503.7.1(15) ELECTRICALLY OPERATED DX-DOAS UNITS, SINGLE-PACKAGE AND REMOTE CONDENSER, WITHOUT ENERGY RECOVERY – MINIMUM EFFICIENCY REQUIREMENTS TABLE E 503.7.1(16) ELECTRICALLY OPERATED DX-DOAS UNITS, SINGLE PACKAGE AND REMOTE CONDENSER, WITH ENERGY RECOVERY – MINIMUM EFFICIENCY REQUIREMENTS
460	TABLE E 503.7.2 MINIMUM DUCT INSULATION R-VALUE TABLE E 503.7.3(1) MINIMUM PIPE INSULATION THICKNESS FOR HEATING AND HOT WATER SYSTEMS (STEAM, STEAM CONDENSATE, HOT WATER HEATING, AND DOMESTIC WATER SYSTEMS)
461	E 603.2 Isolation of Pollutant Sources. E 603.3 Filters. E 603.4 Ozone Depletion and Global Warming Reductions. E 604.0 Indoor Moisture Control. E 604.1 Rainwater Control. E 605.0 Indoor Air Quality for Low-Rise Residential. E 605.1 General. E 605.1.1 Natural Ventilation. E 605.1.1.1 Access to Operable Openings. E 605.1.2 Mechanical Ventilation. E 605.1.3 Dwelling-Unit Ventilation. E 605.1.3.1 Total Ventilation Rate. TABLE E 503.7.3(2) MINIMUM PIPE INSULATION THICKNESS FOR COOLING SYSTEMS (CHILLED WATER, BRINE, AND REFRIGERANT)
462	E 605.1.3.2 Effective Annual Average Infiltration Rate (Qinf). E 605.1.3.3 Required Mechanical Ventilation Rate (Qfan). E 605.1.3.4 Different Occupant Density. E 605.1.4 System Type. E 605.1.5 Airflow Measurement. E 605.1.6 Control and Operation. TABLE E 605.1.3.1 VENTILATION AIR REQUIREMENTS, (cubic foot per minute)
463	E 605.1.7 Variable Mechanical Ventilation. E 605.1.7.1 Short-Term Average Ventilation. E 605.1.7.2 Scheduled Ventilation. E 605.1.7.2.1 Annual Average Schedule. E 605.1.7.2.2 Block Scheduling. E 605.1.7.3 Real-Time Control. E 605.1.8 Equivalent Ventilation. E 605.2 Bathroom Exhaust Fans. E 605.3 Filters. E 606.0 Indoor Air Quality for Other than Low-Rise Residential Buildings. E 606.1 Minimum Indoor Air Quality. E 607.0 Environmental Comfort. E 607.1 Thermal Comfort Controls. E 607.2 Heating and Air-Conditioning System Design. E 608.0 Low VOC Solvent Cement and Primer. E 608.1 General. E 608.1.1 Solvent Cement. E 608.1.2 Primer. E 701.0 Installer Qualifications. E 701.1 Scope. E 702.0 Qualifications. E 702.1 General.
464	Part I E 801.0 Heating, Ventilation, and Air Conditioning Systems Commissioning. E 801.1 Applicability. E 802.0 Commissioning. E 802.1 Commissioning Requirements. E 802.2 Owner’s Project Requirements (OPR). E 802.3 Basis of Design (BOD). E 802.4 Commissioning Plan. E 802.5 Functional Performance Testing. E 802.6 Post Construction Documentation and Training. E 802.6.1 Systems Manual. E 802.6.2 Systems Operations Training.
465	E 802.7 Commissioning Report. Part II E 803.0 Commissioning Acceptance. E 803.1 General. E 803.2 Construction Documents. E 803.2.1 Roles and Responsibilities. E 803.2.1.1 Field Technician. E 803.2.1.2 Responsible Person. E 803.2.1.3 Certificate of Acceptance. E 804.0 Commissioning Tests. E 804.1 General. E 804.2 Tests.
466	E 804.3 Acceptance Process. E 804.3.1 Plan Review. E 804.3.2 Construction Inspection. E 804.3.3 Acceptance Testing. E 804.3.4 Certificate of Occupancy. E 805.0 HVAC System Tests. E 805.1 Variable Air Volume Systems (Form MECH-2A). E 805.1.1 Test Procedure. E 805.1.1.1 Construction Inspection. E 805.1.1.2 Functional Testing. E 805.1.2 Acceptance Criteria. E 805.2 Constant Volume Systems (Form MECH-2A). E 805.2.1 Test Procedure. E 805.2.1.1 Construction Inspection.
467	E 805.2.1.2 Functional Testing. E 805.2.2 Acceptance Criteria. E 805.3 Constant Volume, Single-Zone, Unitary Air Conditioner and Heat Pumps Systems Acceptance (Form MECH-3A). E 805.3.1 Test Procedure. E 805.3.1.1 Construction Inspection. E 805.3.1.2 Functional Testing. E 805.3.2 Acceptance Criteria. E 805.4 Air Distribution Systems (Form MECH-4A).
468	E 805.4.1 Test Procedure. E 805.4.1.1 Construction Inspection. E 805.4.1.2 Functional Testing. E 805.4.2 Acceptance Criteria. E 805.5 Air Economizer Controls Acceptance (Form MECH-5A). E 805.5.1 Test Procedure. E 805.5.1.1 Construction Inspection. E 805.5.1.2 Functional Testing. E 805.5.2 Acceptance Criteria.
469	E 805.6 Demand-Controlled Ventilation Systems Acceptance (Form MECH-6A). E 805.6.1 Test Procedure. E 805.6.1.1 Construction Inspection. E 805.6.1.2 Functional Testing. E 805.6.2 Acceptance Criteria. E 805.7 Supply Fan Variable Flow Controls (Form MECH-7A). E 805.7.1 Test Procedure. E 805.7.1.1 Construction Inspection.
470	E 805.7.1.2 Functional Testing. E 805.7.2 Acceptance Criteria. E 805.8 Valve Leakage (Form MECH-8A). E 805.8.1 Test Procedure. E 805.8.1.1 Construction Inspection. E 805.8.1.2 Functional Testing. E 805.8.2 Acceptance Criteria. E 805.9 Supply Water Temperature Reset Controls (Form MECH-9A). E 805.9.1 Test Procedure. E 805.9.1.1 Construction Inspection. E 805.9.1.2 Functional Testing.
471	E 805.9.2 Acceptance Criteria. E 805.10 Hydronic System Variable Flow Controls (Form MECH-10A). E 805.10.1 Test Procedure. E 805.10.1.1 Construction Inspection. E 805.10.1.2 Functional Testing. E 805.10.2 Acceptance Criteria. E 805.11 Automatic Demand Shed Control (Form MECH-11A). E 805.11.1 Test Procedure. E 805.11.1.1 Construction Inspection. E 805.11.1.2 Functional Testing. E 805.11.2 Acceptance Criteria. E 805.12 Fault Detection and Diagnostics (FDD) for Packaged Direct-Expansion (DX) Units (Form MECH-12A).
472	E 805.12.1 Test Procedure. E 805.12.1.1 Construction Inspection. E 805.12.1.2 Functional Testing. E 805.12.2 Acceptance Criteria. E 805.13 Automatic Fault Detection Diagnostics (FDD) for Air Handling Units (AHU) and Zone Terminal Units (Form MECH-13A). E 805.13.1 Test Procedure. E 805.13.1.1 Functional Testing. E 805.13.1.1.1 Functional Testing for Air Handling Units.
473	E 805.13.1.1.2 Functional Testing for Zone Terminal Units. E 805.13.2 Acceptance Criteria. E 805.14 Distributed Energy Storage DX AC System (Form MECH-14A). E 805.14.1 Test Procedure.
474	E 805.14.1.1 Construction Inspection. E 805.14.1.2 Functional Testing. E 805.14.1.3 Calibrating Controls. E 805.14.2 Acceptance Criteria. E 805.15 Thermal Energy Storage (TES) System (Form MECH-15A). E 805.15.1 Test Procedure. E 805.15.1.1 Construction Inspection.
475	E 805.15.1.2 Functional Testing. E 805.15.2 Acceptance Criteria. E 806.0 Certificate of Acceptance Forms. E 806.1 General.
476	MECH-2A
479	MECH-3A
482	MECH-4A
485	MECH-5A
488	MECH-6A
491	MECH-7A
493	MECH-8A
495	MECH-9A
497	MECH-10A
500	MECH-11A
502	MECH-12A
505	MECH-13A
509	MECH-14A
512	MECH-15A
516	APPENDIX F GEOTHERMAL ENERGY SYSTEMS Part I – General. F 101.0 General. F 101.1 Applicability. F 101.1.1 Prior to Construction. F 101.1.2 Equipment, Accessories, Components, and Materials. F 101.2 Construction Documents. F 101.3 Site Survey. F 101.4 Used Materials. F 101.5 Contact with Building Material. F 101.6 Strains and Stresses. F 101.7 Flood Hazard. F 101.8 Pipe Support. F 101.9 Velocities. F 101.10 Chemical Compatibility. F 101.11 Transfer Fluid. F 102.0 Definitions. F 103.0 Groundwater Systems. F 103.1 General. F 104.0 Design of Systems. F 104.1 Ground-Heat Exchanger Design. TABLES
517	F 104.2 Piping and Tubing Materials Standards. F 104.3 Fittings. F 104.4 Underground Piping and Submerged Materials. F 104.4.1 Polyethylene (PE). F 104.4.1.1 Joining Methods for Polyethylene Pipe or Tubing. F 104.4.2 Cross-Linked Polyethylene (PEX). F 104.4.2.1 Joining Methods for Cross-Linked Polyethylene Tubing. F 104.5 Indoor Piping. F 105.0 Heat Pumps. F 105.1 Heat Pump Distribution System. TABLE F 104.2 PLASTIC GROUND SOURCE LOOP PIPING TABLE F 104.3 GROUND SOURCE LOOP PIPE FITTINGS
518	F 105.2 Circulating Pumps. F 106.0 Valves. F 106.1 Where Required. F 106.2 Heat Exchangers. F 106.3 Central Systems. F 106.4 Pressure Vessels. F 106.5 Pressure-Reducing Valves. F 106.6 Equipment and Appliances. F 106.7 Expansion Tanks. F 106.8 Reduced Pressure. F 107.0 Specific System Components Design. F 107.1 General. F 107.2 Heat Exchangers. F 107.3 Heat-Transfer Medium. F 107.4 Insulation. F 108.0 Installation Practices. F 108.1 Prior to Construction. F 108.2 Equipment, Accessories, Components, and Materials. F 108.3 Construction Documents. F 108.4 Site Survey Requirements. F 108.5 Subsurface Investigation. F 108.6 Subsurface Conditions.
519	F 108.7 Ground-Heat Exchanger Installation Practices. F 108.8 Trenching, Excavation, and Backfill. F 108.9 Trenches, Tunneling, and Driving. F 108.10 Excavations and Open Trenches. F 108.11 Protection of Piping, Materials, and Structures. F 108.12 Sleeves. F 108.13 Steel Nail Plates. F 108.14 Exterior Piping Protection. F 108.15 Heat Pump and Distribution System Installation. F 108.16 Pressurizing During Installation. F 108.17 Horizontal Geothermal Piping – Materials and Methods. F 108.17.1 Piping Material.
520	F 108.17.2 Dissimilar Materials. F 108.17.3 Protection of Piping. F 108.18 Trenches, Excavation, and Backfill. F 108.18.1 Trenches. F 108.18.2 Buried Systems. F 108.18.3 Pipe Installation. F 108.18.4 Separation. F 108.18.5 Insulation. F 108.18.6 Pipe Bends. F 108.18.7 Closed Cell Insulation. F 108.18.8 Tracer Markings. F 109.0 System Start-Up. F 109.1 General. F 109.2 Operation and Maintenance Manual. F 109.3 Labeling and Marking. F 109.4 Documentation. F 109.5 Maintenance. F 109.6 Records. F 109.7 System Start-Up.
521	F 109.8 Contaminants. F 110.0 Decommissioning and Abandonment. F 110.1 General. Part II – Closed-Loop Systems. F 201.0 General. F 201.1 Applicability. F 201.2 Piping and Tubing. F 201.3 Borehole Piping and Tubing. F 201.4 Underground Fittings. F 201.5 Verification. F 201.6 Vertical Bores. F 201.6.1 Backfill. F 201.6.2 U-Bends and Headers. F 201.6.2.1 Test Pressure. F 201.6.2.2 Testing Procedure. F 201.6.2.3 Calculation of Static Pressure (Water). F 201.6.2.4 Calculation of Static Pressure (Other Fluids). F 202.0 Ground-Heat Exchanger Testing. F 202.1 Testing. F 202.2 Individual Loop Pressure Testing. F 202.3 Field Pressure Testing – Final. F 202.4 Field Flow Testing – Final. Part III – Open-Loop Systems. F 301.0 General. F 301.1 Applicability.
522	F 301.2 Test Wells. F 301.3 Installation of Water Wells. F 301.4 Setbacks. F 302.0 Open Ground Water Systems. F 302.1 General. F 302.2 Open-Loop Water Well Drilling Logs. F 302.3 Design Considerations. F 302.4 Water Wells and Injection Wells. F 302.5 Testing and Sampling.
523	F 302.6 Disinfection. F 303.0 Testing and Verification. F 303.1 Pumping Test. F 303.2 Retesting. F 303.3 Variable Rate Pump Test. F 303.4 Constant Rate Pump Test. F 303.5 Water Level Monitoring. F 303.6 Injection Wells. F 303.7 Re-Injected Water. Part IV – Direct Exchange (DX) Systems. F 401.0 Direct Exchange (DX) Systems. F 401.1 General. F 401.2 Applicability. F 401.3 DX Systems. F 401.4 DX System Testing. F 401.5 Indoor Piping. F 401.6 On Site Storage. F 401.7 System Start-Up. F 401.8 DX Piping.
524	APPENDIX G SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION AND VENTILATION OPENING DESIGN G 101.0 General. G 101.1 Applicability. G 101.2 Examples Using Single Appliance Venting Tables. TABLES FIGURES FIGURE G 101.2(1) TYPE B DOUBLE-WALL VENT SYSTEM SERVING A SINGLE APPLIANCE WITH A TYPE B DOUBLE-WALL VENT FIGURE G 101.2(2) TYPE B DOUBLE-WALL VENT SYSTEM SERVING A SINGLE APPLIANCE WITH A SINGLE-WALL METAL VENT CONNECTOR FIGURE G 101.2(3) VENT SYSTEM SERVING A SINGLE APPLIANCE WITH A MASONRY CHIMNEY AND A TYPE B DOUBLE-WALL VENT CONNECTOR FIGURE G 101.2(4) VENT SYSTEM SERVING A SINGLE APPLIANCE USINGA MASONRY CHIMNEY AND A SINGLE-WALL METAL VENT CONNECTOR
525	FIGURE G 101.2(5) ASBESTOS CEMENT TYPE B OR SINGLE-WALL METAL VENT SYSTEM SERVING A SINGLE DRAFT HOOD-EQUIPPED APPLIANCE FIGURE G 101.2(6) VENT SYSTEM SERVING TWO OR MORE APPLIANCES WITH TYPE B DOUBLE-WALL VENT AND TYPE B DOUBLE-WALL VENT CONNECTORS FIGURE G 101.2(7) VENT SYSTEM SERVING TWO OR MORE APPLIANCES WITH TYPE B DOUBLE-WALL VENT AND SINGLE-WALL METAL VENT CONNECTORS FIGURE G 101.2(8) MASONRY CHIMNEY SERVING TWO OR MORE APPLIANCES WITH TYPE B DOUBLE-WALL VENT CONNECTORS
526	FIGURE G 101.2(9) MASONRY CHIMNEY SERVING TWO OR MORE APPLIANCES WITH SINGLE-WALL METAL VENT CONNECTORS FIGURE G 101.2(10) ASBESTOS CEMENT TYPE B OR SINGLE-WALL METAL VENT SYSTEM SERVING TWO OR MORE DRAFT HOOD-EQUIPPED APPLIANCES FIGURE G 101.2(11) USE OF MANIFOLDED COMMON VENT CONNECTOR FIGURE G 101.2(12) USE OF OFFSET COMMON VENT
527	G 101.3 Example 1: Single Draft Hood-Equipped Appliance. G 101.4 Example 2: Single Fan-Assisted Appliance. FIGURE G 101.2(13) MULTISTORY GAS VENT DESIGN PROCEDURE FOR EACH SEGMENT OF SYSTEM FIGURE G 101.2(14) PRINCIPLES OF DESIGN OF MULTISTORY VENTS USING VENT CONNECTOR AND COMMON VENT DESIGN TABLES
528	G 101.5 Example 3: Interpolating Between Table Values. G 102.0 Examples Using Common Venting Tables. G 102.1 Example 4: Common Venting Two Draft Hood-Equipped Appliances. FIGURE G 101.3 SINGLE DRAFT HOOD-EQUIPPED APPLIANCE – EXAMPLE 1 FIGURE G 101.4 SINGLE FAN-ASSISTED APPLIANCE – EXAMPLE 2
529	G 102.2 Example 5(a): Common Venting a Draft Hood-Equipped Water Heater with a Fan-Assisted Furnace into a Type B Vent. FIGURE G 102.1 COMMON VENTING TWO DRAFT HOOD-EQUIPPED APPLIANCES – EXAMPLE 4
530	G 102.3 Example 5(b): Common Venting into an Interior Masonry Chimney. G 102.4 Example 5(c): Common Venting into an Exterior Masonry Chimney. FIGURE G 102.2 COMMON VENTING A DRAFT HOOD-EQUIPPED WATER HEATER WITH A FAN-ASSISTED FURNACE INTO A TYPE B DOUBLE-WALL COMMON VENT – EXAMPLE 5(a)
531	TABLE G 102.3 MASONRY CHIMNEY LINER DIMENSIONS WITH CIRCULAR EQUIVALENTS
532	G 103.0 Example of Combination Indoor and Outdoor Combustion Air Opening Design.
533	TABLE G 103.0 STANDARD METHOD: REQUIRED VOLUME, ALL APPLIANCES
534	APPENDIX H EXAMPLE CALCULATION OF OUTDOOR AIR RATE H 101.0 Example Calculation of Outdoor Air Rate. H 101.1 Example Calculation.
536	USEFUL TABLES CONVERSION TABLES
540	Sl SYMBOLS AND PREFIXES
541	AREAS AND CIRCUMFERENCES OF CIRCLES
542	APPROXIMATE MINIMUM THICKNESS FOR CARBON SHEET STEEL CORRESPONDING TO MANUFACTURER’S STANDARD GAUGE AND GALVANIZED SHEET GAUGE NUMBERS

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